How to fix code P0340. A new cam sensor will not repair this car.

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Join me while I attempt to fix this Ford Mustang that came in which a check engine light P0340. This is not going to be your regular cam sensor code. Let's see what is the issue
Disclaimer:
Due to factors beyond the control of Oz Mechanics, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Oz Mechanics assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Oz Mechanics recommends safe privatice when working with any tools or equipment seen or implied in this video. Due to factors beyond the control of Oz Mechanics, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained

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5 июл 2024

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Комментарии : 434

@OzMechanics Год назад

**Want to own the tools I use ?? Click on the amazon link below to get my top 5 Tools I use** Automotive Test Light- amzn.to/3z1Pdxa Flexible Backprobe- amzn.to/3Pyr3zO Multimeter- amzn.to/3PbuT23 OBD Scan Tool- amzn.to/3zaNWnq Wire Piercing Probe- amzn.to/3OecWhT

@theGADGETSplaylist 5 лет назад

The power of oscilloscopes and people that know how to use them. Good job, Oz!

@OzMechanics 5 лет назад

Just having fun with the scope. Thank you for watching

@Ewolk89 4 года назад

A man that actually knows what he's doing!!! WOW!!! Very impressive!

@OzMechanics 4 года назад

Thank you very much. Feel free to check out my newer videos to see more exciting diags

@PineHollowAutoDiagnostics 5 лет назад

That was an awesome diagnosis, Azael! Great scope work too. Also thanks for the custom PHAD shot glass! :)

@OzMechanics 5 лет назад

Pine Hollow Auto Diagnostics glad you like the shot glass

@philiprowley6427 Год назад

Excellent work Oz, I have been chasing a cam sensor fault on a 2001 twin turbo Subaru Legacy. I swapped out the sensor, checked and double-checked the wiring and so on. I was getting to the end of what I could check! scoped everything and hey-presto NOISE! That alternator seemed fine, was putting out a good charge and all but was causing interference. Changed the Alternator and the vehicle runs beautifully. Thank you so much for your great video.

@OzMechanics Год назад

Awesome!!! Glad this video helped out. Thanks for watching

@billyyoder8171 6 лет назад

Good job Oz. Really appreciate your videos. From experience 120 mV AC to 250 mV AC seems to be the max allowed ripple depending on manufacturers. Usually outside this range you'll get sensor related codes just like this beauty you diagnosed. Even if no codes occur it's good to test AC ripple when newer batteries are testing bad. AC voltage is bad on batteries.

@OzMechanics 6 лет назад

Billy Yoder thanks brother. Yea I’ve been waiting to get something like this. I’ve read about them but haven’t messed with one that would mess with the cam.

@High_Tech_Mountain 5 лет назад

Great Video Oz! I wouldn’t have guessed those small ripples on the cam signal would have such an effect, but when you changed your time scale you can see it clear as day. Thanks for sharing!

@paradoxx2797 5 лет назад

Found this video as I am tackling a stubborn P0335 Code on a 2010 Honda Civic Hybrid (not my first choice in a car but as a ride share free lancer; it is my bread and butter) Replaced cam sensor (New OEM) and it’s back six months after the repair. Ocasional abnormal idle. Rpm activity will act up while driving and shifting gears. Lurches every now and again while driving. I appreciate this thorough and informative video. I am still scratching my head on what could be causing this code but it looks like I found myself a good channel to subscribe to in the process. Video notifications are turned on. Great video!

@OzMechanics 5 лет назад

Paradoxx thanks for stopping by and checking out the video and for subscribing as well. Have some new videos coming out soon

@SuperMarioDiagnostics 5 лет назад

It's things like this that motivated me to buy a scope. Love the diagnostic strategy. Excellent work Oz 💪

@eleazarsolis5942 5 лет назад

I have a 2004 F150 with the code p0340. Changed both of the sensors and check engine light lights up after a while. When the truck is in parking, it feels like a rough idle but once i put it in drive, theres no rough idle. What do u think?

@danrandle65 3 года назад

Dido on the scope fixing to get me one.

@rynechristesen2392 3 года назад

Great video dude! This probably saved me from just running and buying the sensor that the codes are related to if they aren’t actually the problem

@JoesAutoElectric 5 лет назад

Great catch on that signal. True diagnostics at work!

@OzMechanics 5 лет назад

Joe's Auto Electric thank you very much. Have a new video coming out soon that was a fun job

@gilbertojim1263 2 года назад

Very good information I’m in the middle of an electrical problem but I never thought about the alternator causing all those issues with the campshaft thanks a lot very good video👍🏼

@robtemple3445 3 года назад

Nice diag work bro' This one reminded me of a '94 Acura Vigor that would start misfiring around 2500 rpm. It was late in the evening, so I decided to bypass diag mode, & jump straight to iATN Fix Database mode, where I found one hit on this symptom, which turned out to be related to excessive diode ripple. So, I removed the connector from the regulator, & viola, symptom gone! New alternator fixed car. Thanks for another great diag vid.

@robinsonsauto 6 лет назад

That was fantastic Oz!!! 😎💪👍 Way to prove it out. And the great thing is once completed you can verify the repair with confidence! Great lesson

@christianst-jean7362 3 года назад

I had a similar issue with my 09 explorer 4.6,had a P0341 and it turned out it was the alternator problem,changed my alternator and the code disappeared buy itself .Thanks for your video bud

@movingupautodiagnostics8645 6 лет назад

Wow! Excelente diagnóstico! Muy buena observación mi hermano, sin el scope le hubieran metido hasta agua bendita para tratar de arreglarlo.

@OzMechanics 6 лет назад

Moving Up Auto Diagnostics 😂 😂

@NewLevelAuto 6 лет назад

Now how would anyone ever see this without a scope?! Beautiful video Oz ! Great diagnostic process all the way through

@yormanpadilla1111 5 лет назад

i was thinking the same question ...

@amr-50 5 лет назад

without his searching scope wouldn't solve it at all , scope is a good tool when a good reference is available which is not always the case , which proves that the scope is just a fancy tool but it's not necessary at all to have

@NewLevelAuto 5 лет назад

amr hamed so how then would you pursue a flex ray network failure due to signal attenuation? It's not a fancy tool at all. It's quite basic . And if used properly is one of the greatest in any diagnosticians arsenal. Are there other ways ? In most cases yes , but certainly not all. A decent scope is under 100 dollars. A snap on ratchet used is the same price. Remember that we do not have the luxury of just repeatedly fitting parts to see if it's the failure. We only have a few hours and that customer must have their vehicle back. Where are you from if I may ask?

@NewLevelAuto 5 лет назад

amr hamed never mind . I see you like Scotty Killurwallet. And you also know now how to super clean an engine bay as well thanks to Chris.

@amr-50 5 лет назад

BTW i have a pico scope but you already said what i am trying to say ( Are there other ways ? In most cases yes ) that's it

@gonzgarr1592 6 лет назад

another great video with great info on the scope thank you

@pablolopez973 5 лет назад

Excelente diagnostico gracias x compartir sus conocimientos sobre la mecanica automotriz.

@OzMechanics 5 лет назад

Gracias por mirar mi video :)

@Autofixpals 5 лет назад

You would be vey hard pressed to find that without a scope. Fantastic work Azael

@OzMechanics 5 лет назад

Yea that would have been a wild guess there. Hey thanks for stopping by

@DaBrute 4 года назад

Had this problem with my mustang 12 years and no one had a clue what was wrong with it. I eventually found a clue on a crown vic forum and got the alternator rebuild. The guy thought I was crazy for thinking it would fix the cam sensor code

@dmotoguy5640 4 года назад

Great video, the right way to diagnose problems.

@budprepper3811 5 лет назад

awesome troubleshooting, good mechanic!

@BboyIllusi0n 4 года назад

bud prepper he’s technician cus he diagnosed it and confirmed what the actual problem was ;) a mechanic just replaces parts hoping it’ll fix it

@brianslewis9128 Год назад

Thank you so much I have problems with my cam sensor didn't know what was going on until I watch this video and told my personal mechanic and everything worked out right thank you

@EstebanViquez 4 года назад

I liked your video tons more since minute 6 👍🏼

@igfishing13 3 года назад

Wow . thanks bro, from I install a new alternator I been getting that p0340 code, I change the cam sensor two times still no change , so it is the altinator, 1998 lincoln navigator. Thanks a lot back to AutoZone I go

@OzMechanics 3 года назад

It might be something else that code is pretty vague. The proper way is to hook an oscilloscope to it

@wyattoneable 6 лет назад

When I first started down this path of learning about diagnostics, I was attempting to find a way a DIY'er could bypass using a scope and use common methods (cheap). But as I learn, I have also realized having a scope is required, or, you take it to a good shop.

@OzMechanics 6 лет назад

That is true. Scope just makes everything easier and clarifies the actual problem. Once I got my hands on one I was hooked

@mehrabmoradi6516 4 года назад

Good stuff man, wish you were my mechanic

@fredsalter1915 2 года назад

Spectacular video, Oz!!!

@gregt6587 4 года назад

cool man! good job. I got a p0340 code on a Pacifica that will now not start...even after I replaced CPS. BUT!, you have given me another place to consider.

@AnythingEverythingGh Год назад

Did you fixed it ?

@TheRoadLessChosen Год назад

Well?

@bobmathews3491 2 года назад

Great video my friend you rock. Sure helped me on my 97 GMC Sonoma same problem alternator

@OzMechanics 2 года назад

Sweeeeeet and glad this video helped out

@bgjobass 6 лет назад

Loved it , excellent presentation ! I’m having similar problem with my 94 3.1 liter Olds Ciera , gone through 13 cam position sensors , very frustrating, especially if that’s not the problem , same trouble code here

@sargetester99 5 лет назад

13 sensors? , your halfway there man, don't loose hope, don't give up on that one, you are never going to forget that one,

@myfagan 5 лет назад

@@sargetester99 bahahahahhahaha

@fernandoobregon3359 4 года назад

I replaced like 3. They last for like 6 months to a year. Always wonder why same code comes back.

@stevekeller6329 10 месяцев назад

Very well done. I wish your shop was closer

@billrimmer5596 4 года назад

Super good vid. Nice verification. Always love the vids!!

@MrJulgrc75 3 года назад

Thanks bro life saver.. I got the same problem whit this code tomorrow I’m check the alternator signal and camshaft signal too new subcriptor

@lydigital 3 года назад

Hello My friend, excellent diagnostic.

@claymontgomery2448 3 года назад

Hey Oz I have a 2005 Subaru Legacy gt i have a cam sensor circuit code and i changed them both changed the oxy sensors had new coils an sparks done an a month later i got the cam code but it runs fine but when i go to slow down it either dies or has a rough idle. Not all the time does it do this though it is random. Most of the time when i crank up it has a moment or two the idle sounds rough an some times when i put it in drive or reverse it acts up but its random though so no consistent. Would that be the wiring harness to the sensors? being its a Subaru not the best wiring. Or would it be something else cause its not feeling a running like a bad cam sensor thank you for your time!!

@comingundone27 6 лет назад

Very nice video! I am newer to your channel but am very glad I subscribed. Thank you for your videos!

@OzMechanics 6 лет назад

Nick hey thanks for joining in. Don’t forget to hit the bell to get the new video notification

@comingundone27 6 лет назад

It was the first thing I clicked after subscribing haha.

@andrewgreen7234 2 года назад

Wow great video thank you. I want a fancy scanner now!

@enriquemartinez7990 4 года назад

Thanks a lot buddy Grey Bidrio I love your videos which is Gracias amigo👀👍🌿

@royyazzie6028 4 года назад

You did your readiing on tools u use way to go 👍🙌👏

@epifaniocalderon5640 3 года назад

Hi there Oz I have that problem with my 2004 nissan pathfinder I changed twice my camshaft sensor bank 2 cause I don't have that equipment that you have, so you think maybe is my alternator?

@arthuraucar3696 10 месяцев назад

Very informative! Thanks for that great information!!!

@MichaelAnderson-nh4gu 5 лет назад

That was great , my cam pos sensor is barely a year old. The body that the sensor rides on was changed about a year and a half ago. That damn p0340 pops up every month or so, truck runs good so I don’t think that it’s sensor. It’s gotta be the alt. Thank You for the Video.

@misterclark74 5 лет назад

so was it the alt ?

@AC-zo5sl 4 года назад

Hi OZ I have a 2006 dodge caravan and I have an issue with it I got an engine light on and it started to run rough tough to start and jerking at roughly 2500 rpm diagnosed both sensors and wires there perfectly fine can the alternator cause this ?

@Jaguarspaw5 2 года назад

I have an 03 neon that dies when driving. Have codes for cam and crank sensors. Replaced them both and took timing cover off to check it. The timing looked good but I put in a new belt since I had that off. There has been no change it still does the same thing. Is there a way I can test the food of the alternator without the scanner?

@veronicapetrie7674 2 года назад

Thank you! I really hope this will help me

@nickayivor8432 2 года назад

KNOWLEDGEABLE Oz Mechanics Great tutorial thank you very much helpful video Oz Mechanics Good Morning 🙏 🌄 From Nick Ayivor from London England UK 🇬🇧

@markymarky4041 5 лет назад

alternator noise feeding through the entire power lines. Nice. The should put filters on cam sensor. nice video

@linpin2286 6 лет назад

Awesome video!! I love you, I mean, this video so much! - your biggest fan

@OzMechanics 6 лет назад

Linda Perryman ooooh really lil baby. I mean random subscriber

@kimokahikolekalihi 2 года назад

Is there a way to diagnose this without an expensive scan tool? I've just got a fluke meter and a cheap Innova scan tool that doesn't graph.

@danstiverson 11 месяцев назад

I'm having this problem right now on a ranger. I don't have the fancy tools and would not have found this. Thanks. I wonder, however, batteries are capacitors that are used to clean up noise on dc. Shouldn't the battery have cleaned up this problem? I wonder if there is more that is wrong here. Thanks.

@mReYeAmLegend 4 года назад

Does the camshaft position sensor brand matters, such as Dorman brand?

@z0m123 5 лет назад

I done my timing chain on astra h, as soon as you suspected the alternator, a bell rang in my head and I dont remember plugging this little connector back in. :/

@trevormorris14 Год назад

I have this code on a 2012 Chrysler 200 I just picked up cheap. Has new cam and crank sensors and a new connector in the back. Connector tests 5v on one side and minimal on the other. Before the charred connector was changed it was reversed minimal on the othet one and 5v on the one now reading low if that makes sense. Could it be the alternator?

@Iam2tun 6 лет назад

Good catch, great video

@dbobeatz6175 4 года назад

The money light 😂

@bad3s4d6 2 года назад

Nicely done my dude!

@OzMechanics 2 года назад

Thanks for watching

@adamskull6268 2 года назад

Check engine came on and code P0340 cam position sensor. I replaced and check engine light still on. So I did another scan and code P0340 was coming up, suggesting that I check the plug of the sensor. It looked good. Watching your video alternator will be checked. Thanks for the info.

@TheRoadLessChosen Год назад

Did it work?

@lam_nguyenn_ 4 месяца назад

Did it work for you

@dirtyboy8336 3 года назад

I understand the video very well. But I have the same cold going off on my 1999 Dodge Ram 1500 5.9L. And i don't know if it's just that needs to be replaced or is it just my distributor not screw down all the way that's causing the real problem

@dirtyboy8336 3 года назад

I also think that my transmission Governor solenoid sensor needs to be replaced as well because it won't shift into gear 3. Out here in Atlanta Georgia it seems like people at mechanic shops don't want to help me so I'm thinking of buying some tools and fixing the problem myself

@allenburghardt1596 5 месяцев назад

Great info my guy!

@johnpaulgarrett1 2 года назад

He's a genius!

@anthonynicholls8010 Год назад

Great video man✌️✌️

@allpeople7657 2 года назад

Is the p0010 code for 2015 Hyundai Sonata sport 2.4L GDI problem really is what the scanner says it is or the problem somewhere else? also where exactly is the cam position intake solenoid located because where everyone is showing it’s not there on my vehicle. Let me know please

@krazytyler3366 Месяц назад

I got a question. I just replaced my cam sensor (bank 1) on my Nissan Pathfinder 05 and the code is still coming up. What possibilities do you think it could be? Connector? Wiring? Defective part or maybe something else? Because my car starts fine and runs, just bugging that I can't find the root problem. Thanks for the video, gave me more insight!

@modisenyanesebetlela2519 Год назад

Heloo Oz..this is pretty awesome. i am using a Lexus RX300 v6 engine and i had both my Camshaft sensors changed including the Crankshaft sensor. Both the Camshaft sensors responded positively except the Crankshaft sensors which failed to reset. The code keeps on coming back. i also have this Whinnying sound which all along i have been thinking it comes from the Power Steering Pump. Any advice?

@AnythingEverythingGh Год назад

Can it prevent the car from starting at all with this fault in the altenator, where you have P0340 present?

@TheGeno2001h 3 года назад

Great video man good job

@williamgrissom9022 4 года назад

Great diagnostic and shows why electronic problems can be tricky. I hope those who don't wrench on their cars appreciate why the mechanics they pay can't always solve every issue on a 1st pass. It appears the alternator output noise coupled into the analog ground of the engine controller (needs more filters), and also that perhaps Ford chose a too-low threshold for the VR signal from the camshaft sensor. Perhaps purposeful so it would still work as the sensor magnet aged or if installation distance was off, but also makes it touchy to any noise in the signal or controller.

@darishopkins2573 Год назад

I'm betting any noise is irrelevant.

@williamgrissom9022 Год назад

@@darishopkins2573 No need to bet since he proved the alternator was the noise source. He disabled the alternator so the engine then ran off battery alone and the camshaft sensor signal became very clean. He also researched the problem for this specific model and found where others cured the sensor code issue by swapping in a rebuilt alternator. The camshaft sensor error code then disappeared, proving that the noise was the problem (thus was very relevant).

@brokenwrench404 2 года назад

Oh cool. Alternator fits my other codes. I do miss having access to stuff like mitchel online and tech line along with the dealer tsb’s

@reedpritchard8898 4 года назад

I have a 2004 Nissan Frontier 4x4 3.3L V6. It all of the sudden would just not start. It threw the P0340 Code so naturally I had the County mechanic replace the distributor because that is where the Cam position sensor is; well, it still didn't fire after that. I saw another video that said this code could also be caused by the Crank position sensor, so i ordered one of those and it hasn't arrived yet. I also ordered a knock sensor because I also got that code a while back when I was having misfires and needed to replace spark plug 6. It is winter here in Northern MN and my truck is a long ways away from civilization parked in the snow. I really need some help with this one.

@stephenmcgraw3610 2 года назад

Hello sir I have a 2013 Hyundai Elantra it has a code P0016 it’s reading a camshaft correlation Bank 1 sensor A So I replace it and it’s still doing the same it starts rough and stalls When it warms up it runs a lot better any idea what I have to look for or do

@bobbywren123 Год назад

Got the same problem, Thanks!

@OzMechanics Год назад

Awesome. Glad this video helped

@prestigemechanical3600 2 года назад

Great video sir !

@craigeby8016 3 года назад

I got a 2000 Cadillac Deville DHS it has several codes and im now wondering if it all related to my alternator....putting out to much voltage??? Great video... got the 0340 and couple other electrical issues, hmmmmmm

@bbeans5885 4 года назад

nicely done!

@Magdiels_knowledge 5 лет назад

Great Video Bro..

@OzMechanics 5 лет назад

Thanks for watching

@basics7930 3 года назад

really great video...thank you

@OzMechanics 3 года назад

Basics that’s for watching. Glad you liked the video

@jessetrujillo1600 5 лет назад

2003 Honda Accord 4cyl. I got a check engine light P0341 that i need to clear. It sounds like a lawnmower when i start it and the RPM drops and dies out. I changed the spark plugs and coils with new ones and It cleared the 4 codes it had that were P0300, P0301, P0302, P0303, P0304 HELP?

@signetulupan 9 месяцев назад

YOURE AMAZING!!!!!!! Thank you thank you, thank you for the truth!!!!! YOU PROVED IT!!! WOW!!! I love you, bro! SIX professional opinions, NOTHING!!!! Wow, again!6

@ryanmiller6978 5 лет назад

You do nice work.. Other sites have accused the alternator..You explanied and proved it Thanks.

@OzMechanics 5 лет назад

Thank you very much. It’s nice to know you appreciate my video

@graymodeler 2 года назад

Had this problem with my 1984 Camaro. The choke light would flicker and the key buzzer would partially come on at certain speeds. It was the diode trio in the alternator had lost one diode function. Ac feedback caused the choke light to flicker. 7 dollar part.

@chvydrptop Год назад

Nice video, what did you actually disconnect on the alternator to clean up the signal?

@OzMechanics Год назад

The connector

@whereswardo_6368 6 месяцев назад

You think this would apply to a 2006 5.7 hemi on a 300c Chrysler? I’m having this issue, car starts right away when cold but when warmed up it struggles to turn on

@DavidSanchez-sf3by 7 месяцев назад

How are you able to see the cam signal ? I’m using the zeus and have to use 20v scale with 500ms time base

@7jack7 4 года назад

7:35 "Let me try to get this, so it could be nice and good." LOVE IT!

@OzMechanics 4 года назад

Jack got to love that nice and good stuffffff

@7jack7 4 года назад

@@OzMechanics I appreciate nice and good. Nice and good is so much better than nasty and bad. Who among us has an argument with nice and good? Let those who do walk around the block a few more times. Be that as it may, instead of, "How to fix code P0340", I would suggest, "One way to fix code P0340." Your fix, while very nice and good, may not fix all instances of P0340. My neighbor just came into possession of a 2001 BMW 525i that is throwing a P0340 DTC. I need to get a scope like you have to probe the situation. I will keep you updated.

@karyl-lynndesrosiers7599 3 года назад

@@7jack7 fixed?

@7jack7 3 года назад

@@karyl-lynndesrosiers7599 The car had a few other issues besides the P0340 code. My neighbor took it to the local German car shop that has a good rep, Siegfrid's. My neighbor said a new sensor fixed the P0340 code problem. The car ran beautifully he claims, even when it was throwing the code.

@karyl-lynndesrosiers7599 3 года назад

@@7jack7 Done that, twice. Once OTC, second time, OEM. No go, chasing wires as I text. Thank for answering.

@OzMechanics 2 года назад

**** Want to use the same tools I use on this video ?? Click on the amazon links below*** Flexible Back probe Kit- amzn.to/3O15CWT Alligator Clips- amzn.to/3c7l5Hq 8 Channel Scope- amzn.to/3P5Aff1

@bobmorgan1762 4 года назад

Well, I didn’t expect those results.

@JeffBrown1966 5 лет назад

Just one more thing that makes me want a scope.

@RoAdSiCkZoMbIe Год назад

Could a bad alternator with a po340 code cause no start for any reason?

@Westicles805 3 года назад

Could this be the same issue on my 5.4 e-350 econoline??

@tracytillett 2 года назад

Will this also cause a high pitch whine like a super charger on my radio

@keithcrews8363 2 года назад

Good info!

@tajhealthnature8570 2 года назад

Real talk good job. Dont be a parts changer

@sergioavalos9910 2 года назад

Si soy Sergio de México el vídeo me arreglo mi problemas gracias

@kjam4236 5 лет назад

Good video I have a 2004 Mountaineer,I live in Illinois where I just failed the emission test one of the codes was this one P0340 and the other was P1336 from what I could look up one was the cam sensor the other the crankshaft position sensor do you think a bad diode could effect them both because the truck is running just fine,any suggestions

@thomasbackovich3045 Месяц назад

This is the problem I have. Idk what to do

@kjam4236 Месяц назад

@@thomasbackovich3045 man good luck I ended up replacing the camshaft and crankshaft sensors that didn't changed the plugs a couple of bad coils and battery and alternator after the mechanic and other mechanics were saying put a engine in it it wasn't worth it so I got rid of it.... I hate it too because I liked that truck!

@thomasbackovich3045 Месяц назад

@@kjam4236 I’m getting a ticking sound from what’s sounds like the intake manifold and I’m getting a wine. I’m replacing the alternator the two sensors and a thermal housing unit.

@siachen6680 4 года назад

Thank you for the informational video. I got this code on my o3 civic lx 168000mi when I was going uphill on a dirt mountain road @ 35mph. The engine lost power and shutown and the p0340 came on. I cleared the code and was able to come home. Two weeks after it came back on but the engine didn't shut down. Three weeks later came back on again. I cleared it and hasn't come back since then. Checked the alternator and battery and they are good. What should I do? I also have a cat convert below threshold codes that comes and goes every now and then.