Damn Intermittents (2014 Buick Encore 5v Ref Circuit Short)

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Intermittent problems are the worst things to deal with. Here are some tips and what I look for.
P0651 5v Reference 2 Circuit Problem.
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Опубликовано:

17 окт 2024

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Комментарии : 256

@kellyg4112 3 года назад

I have learned so much from your videos! I was able to prove my case with a Ford buyback because I bought myself a data tool and followed alot of your videos. I pissed a ton of dealership techs off along the way specially because I'm a chick. lol

@pitchforkpeasant6219 Год назад

Awesome 👍😁👍

@waynestewart2221 2 года назад

I think tenacity is a part of troubleshooting these intermittent problems. I been plagued with an intermittent no spark for a couple months on a 1995 4runner. Time to purchase a oscilloscope. Suspect 5v sensor circuit in the distributor pick up. Hopefully with a scope I can graph what going on and tell if it's a wire issue or a component. Your vids give encouragement to this old man!

@drjimjam1112 5 месяцев назад

Really appreciate your diligence. Never underestimate the power of the “Fix It” button!!

@knomames9966 3 года назад

I just want to thank you and tell you how much I appreciate all of your videos and knowledge you share with all of us. I'm learning alot from you and you help me out all the time when I need it. THANK YOU Mr.Danner, again and props to your son Kaleb for being a great camera man

@Mr.Scoles 3 года назад

Scannerdanner and cameradanner at it again!

@davidwalk9045 3 года назад

I really enjoy watching when you are at your bothers shop and he's there in the videos... He's funny and you too going back and forth is entertaining, its nice to see two brothers working together

@VashthStampeede 3 года назад

I wonder who gave whom the nuggies when they were kids?

@mikediamond1522 3 года назад

Put a scope on the wires and drive it!

@kc360awareness 3 года назад

Great Job brother. I think the takeaway from this video is COMMUNICATION. With both the shop owner and the customer. Keep up the good work.

@jameshampton3969 3 года назад

Love your videos! You are knowledgeable and seem to diagnose problems the correct way. I was introduced to this channel through a Professor at a Trade School that teaches Autotech classes!

@BSDKllr 3 года назад

I love your videos. Because it shows that even pros need to step back and think about it. It also makes me feel less crazy talking to myself.

@RealWorldGarage 3 года назад

Those drive every mechanic insane

@spelunkerd 3 года назад

Color boards, too! Caleb, you might think about 'new media' at college, if you are so inclined. It would dovetail well with your music and technical skill set. Who knows where this will take you, somewhere good, probably. School can be horizon expanding. At my youngest son's high school graduation day, the principal said that half of the class will end up doing jobs that aren't even invented, yet. I had no idea how true that was.

@bobl78 3 года назад

I own this engine and it´s not direct injected.. but the injectors are very noisy There is a brake pressure sensor in the ABS / ESP Module that senses hydraulic pressure, at the pedal there´s a pedal travel sensor... that senses how fast you press the pedal to assist you in emergency stop situations ( brake assist feature) and also covers the classic brake pedal switch function.... . at the brake booster there is a vacuum sensor that controls the electric vacuum pump ( turbo engines under boost can not create vacuum)

@keithbailey540 3 года назад

I should share this video with all my friends that think cars are easier to fix with the computer systems. I deal with intermittent problems to much. Thanks for all your videos.

@ScannerDanner 3 года назад

I'm glad I posted it. I've been holding this one for awhile and was waiting on the second chance at the car but it never happened. Over a month, maybe 6 weeks since we filmed with no fault.

@MrLipp24 3 года назад

In the UK people/customers seam to think that deleting the codes fixes the fault, Always hear can't you "just turn the light off"

@calebmohler3082 3 года назад

Nice video Danners! Just a quick FYI. That 1.4 is not GDI. It's just normal port fuel injection. The rattle noise is the purge valve. They are screaming loud. Used to have customers complain about them all the time. Unplug it an they would see the noise was gone. Then they were with it lol.

@doublej4077 3 года назад

Speaking of intermittents we worked one on a 727 with the autopilot intermittently kicking off.We changed black boxes, equip. racks, wires , plugs & connectors , and even flew test hops troubleshooting for almost a year unable to duplicate the flaw. Finally the Feds demanded we ground and fix it ! For several days we had a person in the cockpit monitoring while the autopilot was engaged. One afternoon when the sun went down the autopilot did a un-commanded disengage. The discovery was made that a faulty photo cell diode on the instrument panel (to brighten up the instrument panel when the cockpit lighting became dim) was allowing the autopilot to short to ground , and causing the autopilot disconnects. $100s of thousands of dollars spent for maybe a $2 diode in the end .

@bobl78 3 года назад

Great story !

@mph5896 3 года назад

So the parts cannon exists in every industry. I would assume there is a Dorman like parts supplier of the aviation industry?

@doublej4077 3 года назад

@@mph5896 ITT Cannon supplies so many connectors they are very common in aviation.

@Pablo_Automotive 3 года назад

Happy new year Paul and family, is really great to see another video Saturday evening.

@ScannerDanner 3 года назад

Happy new year! Thank you my friend

@PistonShack 3 года назад

Happy New Year 2021 Paul to you and your family! God Blessing. Thanks for another interesting troubleshooting video!

@fascistpedant758 3 года назад

I have a customer with a snow plow that loses ref v 2-3 times every year when he pulls it out of storage. It fixes itself before I can chase it down and eventually stops occurring for the season. So I've been chasing it down for 4 years. Have a great New Year.

@8barbies779 2 года назад

Fascist - you have to PROmise to come back to this comment if you ever figure it out:) i have an old snowcat that gives me different but intermittent problems every year i pull it out too:))) -barbie

@ralfsautomotive 3 года назад

I'm only 5 min into the Video and can tell you something like that almost kicked my but a couple of months back. PCM was the Culprit in my case. The 5V drooped out only for a few milliseconds and came back but it was enough for the check engine light to start flashing and the SUV going into limp mode . Scan Tool(Verus Edge) did not detect it nor did it set a code. I finally managed to catch it with the Pico. It was very Frustrating as it took multiple attempts to finally condemn the PCM.

@HouseCallAutoRepair 3 года назад

The best part is that you PROVED AND VERIFIED the failure.

@ralfsautomotive 3 года назад

@@HouseCallAutoRepair My Slogan is "If I can't fix it you owe nothing" That being said, I do like to get paid as I don't charge that much in the first place LOL

@padraiggalvin2807 3 года назад

what car or engine?

@Mikael5732 3 года назад

What is the difference between the pico and the edge.

@ralfsautomotive 3 года назад

@@Mikael5732 The Pico is not a scan tool it is a automotive oscilloscope(Super fast volt meter) I was actually able to catch the dropout.

@whitetiger8652 3 года назад

Thanks guys and Happy New Year!

@TheCrazy243 3 года назад

Intermittent problems are so annoying. I’ve been through with couple cars. So difficult and challenging but fixed it all.. Happy new year!! Looking forward for 2021. My goal for this year is get better at my diagnostic skills and work MORE cars.

@KBLIZZ333 3 года назад

I've learned just as much from this video as I have from an other you guys have done. Awesome vid, as usual !!

@mikesabin8568 3 года назад

Looks like that fix button on the scanner worked...

@ScannerDanner 3 года назад

hahaha I guess it did!

@mikesabin8568 3 года назад

Can you do a video on diagnostics of gdi injectors for flow and other problems?

@isalmankhan1 3 года назад

What a great way to start the new year, Loved it👍 Thanks SD, Stay Safe❤

@TheDe1deonly 3 года назад

Coupla months ago was fighting a Nissan Altima that the windows, seat, locks, etc would intermittently stop working; found after much investigation that there was one small section of wiring harness going through the frame to the driver door combo switch that was not protected by plastic sheathing... it had rubbed through the tape and a couple of hot wires insulation! When it moved off the frame, the BCM internal fuses would reset, and everything would work fine until the wrong bump or door slam re-connected the short!!! I think I used an entire roll of electrical tape on that section... LOL!

@resindoctor2523 3 года назад

Hi Scanner Danner, early this year I was having trouble with my 2005 Ford f150, was missing on cylinder5 i changed injector, coil, plug was still running rough. I checked the injector plug with a node light nothing. I traced wire back to ECM(computer) to see if I was getting power to injector #5, it showed no power. I ordered a new computer still didnt run right, I finally unwind the wire harness from #5 and found the wire was broke. Lol all that for a broke wire. Thanks for the help. Shes running fine now for a Ford

@paulmonk7820 3 года назад

Don't hate familiarizing yourself on video. Shows us how to find info and that even the best don't have all the answers automatically. We're learning from even your frustrations.

@martinfeile 3 года назад

Nice Video...havin troubles on a p0651 with my Alfa Romeo gt 2008, for over a year now. Intermittent, always appearing shortly After starting to drive. Car goes down in emergncy Mode. Over the holidays i cleaned all earth points i could see, hoping this helps...Futurewilltell. Have a Good 2021 and keep on scanning and filming...greets from Germany

@peter15847 3 года назад

In your Data PID's it said (APP % 0). I think I also caught a glimpse of BPP (Brake not applied). It was in park/neutral also, if the customer could lend some insight that'd be great. If they went to put it in gear and depressed the pedal and it acted up it would be a reason to lift your foot for sure. Allowing the circuit to recover. Almost guaranteed there would be a "drivability/performance" issue being that not only the the crank sensor is on that circuit ( as you stated a lot of modern vehicles don't require the signal" but also the MAP/IAT.

@wolfparty4234 3 года назад

Your videos are very helpful!! Thank you for sharing, your a very smart dude!!👍🏻👍🏻

@priscripzionz 3 года назад

The very best to you and your family 👪

@VashthStampeede 3 года назад

I was wondering about the computer seeing 11.7V on a running engine that should have much higher battery voltage? Is this just sensor returns?

@ScannerDanner 3 года назад

I only saw that in the final production! Was wondering the same thing yesterday. This was filmed over a month ago with no issues since we touched it, so I have to call that a non issue. Maybe a smart charging system that hadn't kicked the alternator on yet? Good eye. I really don't have a better explanation for that.

@josephwash109 3 года назад

I noticed that 11.75V on the ignition 1 circuit as well. It seems plausible to me that the PCM set the 5V reference code as a result of a failing battery. It looked like it was the OE battery under the hood, so it likely is due for replacement after 6 years of service. I figure the PCM flagged 5V reference 2 because it's the most critical to engine operation with the CKP sensor.

@ScannerDanner 3 года назад

@Joseph Wash thinking about your comment and the battery itself could have been the issue here. I may be in agreement. You know what I'm missing? A word from the customer on symptoms. Super important piece of information here that I didn't have and if it was a start up only check engine light with no symptoms...bam, that makes the most sense. If however it was while he was driving and he had driveability complaints, we are on a completely different path (the one I walked)

@bleachinuri 3 года назад

@@ScannerDanner i get this alot with the virus, its seems to be a glitch in the software.

@OzMechanics 3 года назад

and im working on a 2012 GMC Acadia with engine code P0641 and P2230. 5v ref signal 1 error cod. wish me luck

@ScannerDanner 3 года назад

You found it thought right? This is the one you sent me?

@OzMechanics 3 года назад

@@ScannerDanner yes sr l. Should have a video out by next week

@mikejmardis 3 года назад

On ‘“fix it”, if your subscription was up to date, it would show you a history of parts that fixed it based on miles. I use it to ensure I haven’t missed a system when I go through my testing. It helps, somewhat, when you have incomplete or inaccurate wiring diagrams.

@jayblackwell8484 3 года назад

Really looking forward to the CAN network fault video. I do not know a whole lot about CAN-BUS systems do you have any videos that you teach more on that subject?

@albertsautodiagnosticsllc2130 3 года назад

One of the instructors I had for electrical diagnostics told me there's no such thing as a intermittent concern because once you figure out how to duplicate it you can duplicate it every single time after that it's just a matter of finding the exact fault setting criteria...sounds good haha 😄

@ScannerDanner 3 года назад

just a play on words right?

@99GrandAM3400 3 года назад

Hey! Just bought your book, it's great! I also just bought the Autel Maxiscope to use along with my Autel MS906TS. Do you have any experience or have you seen the scope used? Hope it's decent. I'm just beginning to learn about scope use. On another note, PLEASE tuck those hoodie strings into your hoodie or snip them off. I've never had a near death experience with them on a running vehicle, but have come close to them catching in a belt or pulley. After a time or two of that i'm very aware of dangly bits (not THOSE, that would be a feat all in itself!). Stay safe and thanks for educating us!

@joehomanick 3 года назад

Hey Paul I had issues with the cel coming on for pressure differences and a 5volt ref . Couldn’t figure it out and there was an update for the software .. actually 3 updates for other things too . Check for an update and do them .

@BigD1395 3 года назад

Be strong in the days to come brother!

@squenix8444 3 года назад

Thanks for your videos, I've learned so much thanks to you! i havent found a diesel case yet though, is there a particular reason? ;-);-)

@ScannerDanner 3 года назад

Not many small diesel engines here in the US my friend

@declanosbourne62 3 года назад

Hey scanner danner. My 02 civic is giving me this check engine light with codes p0325 said bank 1 knock sensor,no signal. Next code: p1505 pcv valve air leakage but there are no vacuum leaks anywhere. I know is air is in the system it will give the p1505 code as it came up before and bleed the system and it went away and came back now with both codes that i listed above. What are your thoughts on these codes.? Your help really appreciated..

@davidraezer5937 3 года назад

I have a 12 Jeep Wrangler that stalls for the customer once every month or so and won’t restart for 15min. I put a OTC flight recorder on the OBD port hoping to see a PID that will give me a direction. If not I’m going to go through the TIPM

@ohboy2118 3 года назад

3.8Gb file issue suggests a FAT32 file system limitation. Is it internal storage on the Autel device or a USB stick/sd card? If it is external storage see if you have the option to format the volume as NTFS or exFAT to allow larger file sizes to be used. Happy New Year to SD and family.

@ScannerDanner 3 года назад

unfortunately this built in recorder has no options for any of this (storage location etc) I'm using Mobizen and it is better anyway as it records audio and is easier to sync. Thanks for the info! Makes sense

@bohawkins5258 3 года назад

I’ve had 2 intermittent issues this week, 1 was a coil connector on a v10 Ford that wasn’t clicked on. The other was a intermittent loss of power on the freeway, old school 7.3 powerstroke, had a aftermarket tune that was the issue, removed the tune and the problem went away.

@KBLIZZ333 3 года назад

Is that underhood light rechargable? If so, I'd love to know who makes it. I just blew a bunch of $ on a Snap-On ECUHD218G underhood light and I really don't like it, like at all.

@jayblackwell8484 3 года назад

Do you have any videos explaining CAN networks?

@ScannerDanner 3 года назад

I do on my website. I have a network/no com playlist with a bunch of videos with more coming as we speak! www.scannerdanner.com (ScannerDanner Premium)

@jayblackwell8484 3 года назад

Awesome thank you

@MarioDallaRiva 3 года назад

?: Paul, at the freeze frame data (~9:00 mark) the APP% shows 0 with throttle at 25% and revs at 1381RPM. It struck me as odd to see the accelerator pedal position at zero. Is that to be expected?? Thx!!

@jesserousseau2481 3 года назад

I'm trying to figure out how to look at my live data on my 98 k2500 5.7. No codes but still runs a little rough and I've cleaned and fixed everything!!! I bet if I could understaind the live data I would he able to see ware my problome is.

@autotech5042 3 года назад

Had the same exact issue on that same model and year vehicle. The issue was the ecm. But in my case when u shut down the vehicle, and turn it back on, it would go into limp mode and flag that code, and went to limp mode. When i check data, 5 volts is ok. So i did that same test with scan tool monitoring the 5 volts, you can see the 5 volts ref 2 slowly climing up to 5 volts.

@ScannerDanner 3 года назад

This is a great tip! Thank you for this information

@josephespinoza9354 3 года назад

@@ScannerDanner i had one hear in south Texas had to let run 1 hour turn off for 1-2 min. Hot soak . lost 5 volts and crank no start BAD ECM .

@According_to_Baylen 3 года назад

Happy New Year Paul & Son

@dancocervei7907 3 года назад

Loud clicking noise coming from evaporation valve wich is in top of the engine (13:06 it can be seen there ) also it affects fuel trim when it brakes completely ,you can disconect it and will see that clicking will disappear ))

@brycelund4112 3 года назад

What does it do?

@rocketcharger17 3 года назад

Intermittent transmission sensor on my 2012 elantra touring Dan ! Magnet got tired ? 124,000 No codes no lights Intermittent issues for 6 months Had to figure it out myself after just slapping in a part The Mechanics in Omaha Need you training them ! 😎✌️

@ScannerDanner 3 года назад

did you fix it? Not sure what your question is. Thanks!

@cullenmiller8170 3 года назад

Happy New Year. Hopefully it’s not an omen of what’s to come. I’m already over it two days in the New Year. I had three things break and water line that started leaking. 😡

@livedsemoc3632 3 года назад

I get my tail whipped on just about everyday on these vehicles of today, A little bit of everything, my worst problems is lack of customer of knowing how vehicles work. It just stopped? It will not stay running? It jumps? There is a noise coming from the vehicle? I ask most people how long they have to drive before the vehicle acts up, most do not know or about every other week is there answer. I feel for all mechanics or techs with today's vehicles.

@RAVETOR 3 года назад

Awesome video! Does someone know what can be wrong with my car if it's suddenly just losing power while driving (normally at lower speeds, it has happened many times that way what I'll remember), If I give it gas and push down hard on the gaspedal, it increases the speed and it goes back to normal. This happens intermittent, which sucks. I used my scantool and got the code - hall effect switch low voltage. Can this cause my symptoms?

@markferraro5250 3 года назад

Happy 21 SD thanks for video good stuff consider a 4 channel pico on each 5 volt ref with mask and alarm keep em coming

@MedinaCliff 3 года назад

ScannerDanner I have a PO453 fuel tank pressure sensor reads high. Is there a way I can trick the computer so I can get through inspection?

@johnbickle4654 3 года назад

Hope to see the fault with this so frustrating , never seen freeze frame data for the brake pedal sensor ?. thanks for the video and happy new year to you both .

@canadatransistor 3 года назад

No gdi in that one bro - exclusively port injection. boost sensor and temp combo on RH side nead throttle body intake. This sensor is highly susceptible to heat soaking. It's a major pain in my butt with my Cruze. Same engine. Cables under intake manifold likely got disturbed because the intake was replaced. This is a common requirement because of the integrated pcv check valves.

@ablackformula 3 года назад

This may be hack-ish, but if a car has 3 separate 5v circuits and the problem repeats itself, but only once a week or whatever... I would consider swapping sources. For example, if 5v ckt 2 has the issue and runs 3 sensors - move sensor A to 5v ckt 1, and sensor B to 5v ckt 3. See if the codes move to narrow down which sensor may be causing the issue.

@ScannerDanner 3 года назад

These would be hard wired circuits. Each sensor has it's own 5v reference that is shared inside of the PCM board. What you are suggesting wouldn't be possible without butchering the harness and rewiring every sensor. Good thought though.

@aw317 3 года назад

Yeah those do suck lol. I noticed in the freeze frame data it said miles since last occurred was 257 miles. I would probably ask the client if they were driving on a rough road when it happened and see what they say. Given the loose harness situation may have been the case and a possible internally broken wire like on some of your older videos. I.e. with wheel speed sensor wires breaking internally that you found with a tug test.

@throttlebottle5906 3 года назад

go inspect for rub out points without touching or moving anything. that is where I'm good, finding a flat spot on perfect ball bearing or needle in haystack :)) **use inspection mirrors or bore/snake cameras!

@moemansour7369 3 года назад

Happy new year teacher

@philpersonal4656 3 года назад

One of the things that bugs me is people not returning looms, hoses etc to their original position/clips. Do you discuss these foundation skills with your students?

@shaunblakemore7150 3 года назад

Very frustrating, I know it’s not related to this video but I have just received your book and a uscope for Christmas gifts, I’m new to this and was wondering how to set up the uscope to check for alternator ripple? I can’t wait to read your book and try out the uscope, thank you

@ScannerDanner 3 года назад

Thank you! Merry Christmas. As far as setting up the uScope for alternator ripple, make sure you have the scope set to AC couple with a 100mv/div, maybe 200mv/div

@hcdgj.1675 3 года назад

Thanks bro very good job keep up the good work

@chrismay9319 Год назад

Was it a brake pedal position sensor? Gm used alot of these recently

@sinegra30 3 года назад

Haven't seen the video yet but I just think in a Wiggle test and check harness friction points on hot areas and moving vibrating places just like your book says... (edit) after watching my thought is look for TSB's

@Mikael5732 3 года назад

Dan, what scanner are you using? Does that scanner screen include all of those wiring diagrams?

@brycelund4112 3 года назад

Snap-on Verus edge.

@StromboliKicks 3 года назад

Intermittent CEL. Story of my life.

@kylemurdoc 3 года назад

Honda/Acura diagnosis videos! Common issues like SRS light from a dirty seat belt buckle.

@orlandocortes8022 3 года назад

Estoy esperando que traduzcas el libro para comprarlo 😠 54 años y bajando el ritmo😂👨‍🔧🔧🔩🚘

@hoaxs1939 3 года назад

Per the Freeze Frame. I suspect the fault set shortly after a cold start/ cranking event. Based on Temps, APP, TPS and IGN B+ read 11.75v. I question if B+ at the ECM dropped low during cranking and caused the fault to set. I would think there would be associated faults due to low B+. Its a bummer not knowing the history/ story. Other than that, the PVC system is a common failure on the that Engine which requires R&R of the Intake/ Valave Cover. Some M.Y are under Factory Recall. Finding the missplaced harness at the intake raises a flag for potentially poor Workmanship issues.

@mikechiodetti4482 3 года назад

Intermittents. Have had them in the past. Only good thing about them is when you say "I gotcha!" Meaning you got it to show itself!

@Mikes_Repair 3 года назад

I deal with these situations on at least a bi-weekly basis. These can be time consuming and frustrating. For me, it is a great feeling when you get to that aha moment. Just keep in mind guys that your time is valuable and you have to charge accordingly. At the same time you need to keep your customers informed, and explain in detail what you did.

@gmtech2012 3 года назад

As a GM tech I see A LOT of terminal tension issues causing intermittents. We actually have test probes that check for the right amount of tension in connector terminals. Even brand new vehicles I've seen some completely hogged out and not making good enough contact.

@gmtech2012 3 года назад

Oh and there may also have been something going on with connectors x112 and x200 according to that diagram.

@ekimbrough1413 7 месяцев назад

Paul...since there are 3 codes and '2' of those codes involve and MAF/temp sensor combo...can that unit be tested?

@ScannerDanner 7 месяцев назад

This has a 5v ref circuit problem, so any sensor that shares that 5v ref is suspect

@ekimbrough1413 7 месяцев назад

@@ScannerDanner And you have a combo unit with two sensors in it that share the 5v ref.

@mattt4183 3 года назад

In addition to the 11.7V freeze frame voltage, APP is 0% but RPM is 1,300?? And the vehicle is open loop with both O2s the same mV. Looks to me like the vehicle has just been started.

@ScannerDanner 3 года назад

Very good insight! I missed that. That explains the 11.7 volts better than I did in another comment. This legit could be from a weak battery as another suggested. I got to go back and find that comment now.

@bobl78 3 года назад

@@ScannerDanner .. there is a 2s delay after startup before the alternator is ramped up ... to prevent engine surge after startup.. I guess failed reference circuits set a DTC right away without any delay and in this case before the alternator kicks in. I would not think the battery is weak, 11.7v right after cranking with no alternator sounds reasonable, but having it checked does not hurt.. I`ve had a low battery not just once, even to the point of a no start and it never set any codes...

@jedilungs4203 3 года назад

I noticed that data as well, might be on initial start up. Ftps was 0% also. GM is funny with using other sensors/circuits to determine some other sensor correlation and data, the info for the code is pretty in depth to, lmao. Not to mention GM's great scan tool and set up, again lmao. Witech is way ahead of the rest in my opinion. Anyway I don't think the circuit is the issue, something else that is correlated with it somehow. Just my thoughts though.

@alangaudry724 3 года назад

You could tape around your ring for additional protection.

3 года назад

Anyone here that’s good with oscilloscopes near Santa Cruz ? To help with Porsche crank no start after engine swap and new cams. Lmk

@paulholt8153 3 года назад

A few things about this video. First: The painting of the horses on Caleb's wall is on point. Second: I am the master of sharp focus and third: Why did I do that...that was stupid. I'm calling this the wiggle video.

@nemanjadzombic6101 3 года назад

Thank you for another perfect video!!!

@nodakhunter 3 года назад

5v ref resistance check to ground. Wet the engine bay. If it is shorted to ground any resistance to ground is an indication the wire is exposed.

@michaelnicholson9092 3 года назад

Paul, I'm curious as to your thoughts of a inductive kick from the starter into the 5v ref. The code criteria is a ref voltage fault. Not short to ground or power but fault. Your observations on the harness by the starter and the freeze frame data is what comes to mind. The freeze frame data almost tells me the engine just started on both screen shots. Am I overthinking here? Voltage interference on the Ref?

@ScannerDanner 3 года назад

You are not my friend. Others have pointed this out too. The was a fault that occurred on start up. Something I missed!

@michaelnicholson9092 3 года назад

@@ScannerDanner I didn't see any of those comments. I didn't read into the thread. I'm speaking from a experience with a F150 that was stalling with no codes I worked on a few years ago. I found the CKP harness was rubbing on the AC compressor. Not wire intrusion was present but there was a lot of grey fine metal around that area from the rubbing. I had noticed that when I finally got it to duplicate the fee times I did, my observation was it was just as the AC cycle off. After I moved it. It never returned again in my bay. I had to do a catch and release on this ticket because I was still unsure of myself and the possibility of the fault and fix. I had that ticket for 14 hrs on 3 returning trip from the customer trying to nail it down. After that never came back. Called the customer a few months later and she said it was still good. IDK. It tested me to the point of me questioning myself.

@michaelnicholson9092 3 года назад

Btw. I was aware of the diode in The JB. It's wasn't that. My thoughts were that the inductive kick from the AC clutch was inducing a abnormality in the CKP signal. But by the time I put my scope on that circuit I had already handle it. Contaminated the crime scene. There was the grey metallic paste around the loom from the wear on the compressor. The fault only happened after it rained. The clues in the story that come later. Lol

@bleachinuri 3 года назад

duramax with a can problem, what a shock, i find broken can wires in the harness on those often

@eldinh6270 3 года назад

Had a honda element come to our shop, customer was advised to go to the dealer. inside of he car there was a danner automotive busines card. small world

@garybaughman7099 3 года назад

Welcome to GM freeze frame and failure records. As you discovered quite often the information you find stored in them has nothing to do with the system or circuit related to the DTC that triggered them. Freeze frame and failure records should contain information that is related to the DTC that triggered them or as you found out in this example the 5V ref showed 5V not a lower value which is what was needed to set the DTC, so it just leaves you talking to yourself saying this doesn’t make sense.

@briandish1787 3 года назад

Intermittent/Randomly occurring issues are a pain in the a$$, have to happen as you are checking, or able to cause/repeat to verify. Good luck just maybe you fixed it by moving the harness back into it's correct location by luck that is! Happy New Year!

@shawnbauman5463 3 года назад

Pin fit issues cause a lot of intermittants. Also terminal fretting is a thing. I see a lot of intermittants as the Master Tech at a Nissan dealership. I've got good at them.

@shauno3697 3 года назад

You lost me around 7:25 when you said one sensor can't shut the car down. This confuses me in a couple ways. I've always understood from prior videos that the 5V ref always originates from the same spot in the PCM no matter how many pins it splits to at the connectors. Even if they're now independent ref ccts, I'm not sure how a shorted sensor couldn't still kill a car. The hypothetical scenario playing in my head is the cam sensor shorting out and it shares a ref cct with a crank sensor. One failed input mutes the other and Caleb's mocassins are getting dirty in Danner's shop again. I have my own little case study that helped make me question this. 08 Escalade, crank/no start, I can't remember codes (I believe it pointed at a few sensor circuit low voltages), other hands had been into it before me. 5V ref ccts came into question during my diagnosis. Just like the Buick, it had at least four 5V ref ccts. DVOM testing at the PCM, two of them showed 5V, one showed 2.3V, and another was less than a half a volt. Unfortunately, I checked the oil pressure sensor last because I was told it had a new one. But, that was the shorted Duralast part pulling down the ref ccts and the engine started once it was disconnected. I realize we're not quite apples to apples here between makes and model years, but it's GM junk none the less. I wondered then as I do about it now: Between my Caddy and your Buick, did GM, at some point, make truly independent ref ccts within the PCM board? And to your statement in this video: What's different in newer model years that a car can't shut down on a shorted ref cct anymore? If you're willing to entertain my long way to ask a question, thanks in advance and thanks anyway for another video.

@gertjan0089 3 года назад

Whooo a New video! Thanks

@michaelsieber6601 3 года назад

Any of the 1.4 have already got a new intake manifold and valve cover under warranty so someone has been in there before

@troysmith9453 3 года назад

Ok I'm going to let you slide with this one 😂

@theASEtech 3 года назад

When I started to wear glasses I had that problem and I just went to get some thing to help me to not drop them and break them

@HotRod-wv4vm 3 года назад

Thanks for the video

@alanw5879 3 года назад

Those injectors are normally that loud?

@sparkyobrian1383 3 года назад

we have alot of intermittent faults in he airline industry, it can be very frustrating to work a problem for two days and the fault suddenly disappears.

@tharakanuwan9986 3 года назад

What if it shows up on the fly :)

@sparkyobrian1383 3 года назад

@@tharakanuwan9986 :D

@hatfez 3 года назад

Intermittent wedding band wearing reference signal. I had a gold medallion on a small chain around my neck. Leaning over a hot engine, the thing would get real hot. If I leaned back, I would get burned on my chest. No jewelry is a good rule.