How to test a fuel gauge (tank sending unit) P0463 - GM

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P0463 Fuel Level Sensor Circuit Signal High/Open trouble code. In this video I will show you how to test a fuel tank sending unit (float). Typically the spring loaded fingers that ride on the resistor in the tank will break off, ruining the sending unit. The only fix is to replace the float as an assembly or try to piece a new resistor assembly into the existing sending unit. The electrical design of the fuel tank sending unit that GM uses is identical in operation and testing as a temperature sensor. The difference is in what changes the resistance of the external resistor. On a temp sensor, it is temperature, on a fuel level sensor, it is the position of the float. For this reason, I have placed this video in my Section 6 "Thermistors" playlist.
Engine Performance Diagnostics chapter 6 pages 10-11
Symptoms
- in-op fuel gauge
- fuel gauge stuck on full or empty
- fuel gauge works some of the time
- trouble code P0463
Fix
- replace fuel tank sending unit
Tests shown
- description and operation of the electrical circuit
- fuel tank level signal and ground wire tests
- how to perform a circuit integrity test
Tools used
- scan tool
- digital multimeter
- back-probing tools
Playlist
- (Chapter 6) Temperature Sensor, Thermistor Circuit Tests
• (Chapter 6) Temperatur...
Related videos
- How to test a coolant temperature sensor (ECT sensor test)
• How to test a coolant ...
- How to test an Engine Coolant or Intake Air Temperature Sensor (any car) • How to test an Engine ...
- What's on ScannerDanner Premium? ("Chapter 6: Thermistors" Preview) • Chapter 6 (Thermistors...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdan... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, 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 these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

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1 окт 2024

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Комментарии : 250

@ScannerDanner 11 лет назад

Go to my website listed on my channel page. I cannot put the link here, but it is scannerdanner d o t c o m. If you have any questions fill out your info on my website and I well get back to you. Also watch my video about my ebook on my channel page. Thank you !

@ScannerDanner 12 лет назад

@majstorivan84 That is awesome friend! I almost never use an ohmmeter anymore. In fact more times than not the ohmmeter will lead to misdiagnosis. By the way I have Serbian roots on my moms side. It is a small world isn't it? So greeting to you too from the US. A country full of mutts :)

@cristianjuarez8150 3 года назад

Greetings, thank you for all your videos and information. Can you please elaborate on this comment? Why not use ohmmeter and how it leads to misdiagnosis? If you have a video on this already my apologies. Thanks!

@ScannerDanner 3 года назад

@@cristianjuarez8150 Here you go, best example that I have ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-McsNOJvd0ao.html

@ScannerDanner 12 лет назад

before condemning the computer you must check the 5 volt reference circuit for shorts to ground. watch my 3 part video on a Jeep with a no start where I am doing just that. if the car still runs and it is only the coolant sensor circuit that is being affected then you must check this circuit for a short to ground before condemning the computer

@Waynestarr2 12 лет назад

Eric The Car Guy sent me here! You are DAMN good! Very impressed.

@williamhinton5906 Год назад

I was a navy instructor and taught reactor operation and instrument control repair and calibration. Your instruction is on a par with naval training for the reactor controls. Kudos my friend. ET1(SS)

@ScannerDanner Год назад

That's awesome! Thank you so much

@DIYautotech 12 лет назад

I appreciate the electrical diagnosis videos you have. I have been certified in a few different sub categories as a tech, including advanced electrical diagnosis, but none of my professors came anywhere NEAR as close as you have in making sense out of circuits & showing how the powers/ grounds are switched. I will make sure to tell all my followers about you. Keep it up for the sake of all the younger generation guys who are gonna need to tackle todays advanced vehicles.

@trekvana 11 лет назад

no need to watch again, i think i got it now. the voltage was fixed at 5 volts. then you jumped the signal wire to ground (with connector still plugged in) and it dropped to 0 volts. so you pretty much provided a different path to ground thereby bypassing the resistor in the sending unit (since current will flow through the path of least resistance). is that right? also what do you mean by pans when you said "jumping the 2 pans". thanks

@ScannerDanner 12 лет назад

If its a GM, its almost definitely the tank sending unit resistor. The fingers that would make contact with the resistor have poor contact problems and eventually break off.

@jamesh6922 4 года назад

Hello, ScannerDanner, great video, I am getting a P0462 error code in my Lincoln Navigator 2006. my fuel gauge seems accurate with the gasoline in the tank. no gas gauge issues but my check engine light stays on and I cannot pass the state emission test.. when I check with a OBD2 scanner, I have got the Fuel Level Input (PLI) value to 0, I was not able to read the voltage of the Fuel Level. Also the P0462 states Fuel level sensor A circuit low imput, What is the sensor A mean here? is there a sensor B somewhere there? thanks!

@YouTube.TOM.A 6 лет назад

So much good information my head will explode !!. just doing some review before fixing a friends fuel gauge. thank you

@visittbilisi3077 5 лет назад

Thank you, this information saved us a lot of trouble. Great Work!!!

@ScannerDanner 12 лет назад

Truthfully you don't know for sure but I think what you said about the low fuel light makes me feel better about the gauge reading accurately at the lower tank levels. It is common for gauge sending units to have contact issues in only certain places on the resistor. That's what it sounds like to me.

@benmixmaster 12 лет назад

I've had a lot of "HIGH END" training materials, and scanner danners training materials are "HIGH END" as well. He definately demonstraited simple fuel guage Diagnostics in this video, using paper clip at tank connector, jumpering 5 volt reference to harness ground and watching scantool voltage to go from 5v to 0 volts when grounded, proving problem to be towards tank sender unit.Glad that Mr. Danner has made this video and his book available to me and any person who may work on my car some day.

@ScannerDanner 11 лет назад

these two gauges have NO direct wiring to sensors, information is shared on a data network. check the fuel level sensor and coolant temp. sensor readings on the engine computer data, if they are good there and not on the cluster, you have a cluster problem

@ScannerDanner 11 лет назад

The gauge on this is computer controlled and there may be a default position with the signal fixed at 0 or 5. Try using a resistor between the terminals to drop the signal voltage somewhere between 1 and 4 volts. This should result in gauge movement. Remember you may need to cycle the key and clear the code for the gauge to move.

@ScannerDanner 12 лет назад

yes. a thermistor circuit will not be damaged by jumping the signal to ground. and they very in resistance from car to car. 30kohms cold is just an example

@ScannerDanner 12 лет назад

The P0452 code has to do with the fuel tank pressure sensor. It sits on top of the tank unit. These code are not related, but they do share a common ground. It is a common GM fault to have a bad float resistor cause the P0463 DTC

@ScannerDanner 11 лет назад

to be honest with you, I do not remember. I think I remember the signal voltage being fixed at 5 volts. and if I remember correctly, I wasn't doing a bypass test I was checking signal circuit integrity. so with the signal voltage fixed at 5 jumping it to ground would be the same thing as jumping the 2 pans together. maybe I need to watch it again when I get time to answer you better

@ScannerDanner 11 лет назад

OL-Fault means the system is running in open loop and is usually from an O2 sensor problem or from an overly rich or lean AF ratio. This has nothing to do with your sending unit.

@ScannerDanner 11 лет назад

hmm, 3v should have shown you something on the gauge. Did you search iATN knowledge base yet? To see if the cluster was a common issue?

@ScannerDanner 12 лет назад

check it for a headgasket failure. common problem on this model. also make sure your coolant level is full (when the engine is cold of course).

@fivefortyeye540i 12 лет назад

Just purchased the book, Really defined, well im in the first section studying stft ltft trims all this critical knowledge for the price is unbelievable!! GET THE BOOK FOLKS !! You will NOT be disappointed,

@2jzz31 6 лет назад

Mr. scannerdanner you are absolutely amazing at how you simplify and explain how this things work. I have learned so much from your videos on here & am so thankful for you sharing this with us on here. Thanks again and I hope you are blessed for the work that you do to help people.

@ScannerDanner 6 лет назад

Thank you Josh!

@b.b.4448 4 года назад

2binsons

@ScannerDanner 12 лет назад

@DIYautotech Thank you! I really appreciate the comment and the word of mouth. Have a great day.

@AlonSOAMAZING 7 лет назад

Can I use this wiring diagram for a 2002 chevy blazer . 4.3 l engine ?

@ScannerDanner 12 лет назад

@foxholewilly It is like that for me! It also feels like that when my students "get it". Thats why I love teaching. Thank you so much for your comment.

@JohnzCarz 12 лет назад

In a pinch, can you use the vehicle’s own fuel gauge as the indicator of wiring integrity (instead of the scanner reading 5v/0v) when shorting the sensor signal and ground wires or does the diagnostic code cause the gauge to stop functioning until it’s cleared?

@nickayivor8432 2 года назад

SUBSTANTIAL Sir ScannerDanner Thanks 👍 Sir ScannerDanner From Nick Ayivor from London England UK 🇬🇧

@ejjimenez3753 12 лет назад

hello Danner I have the p0452 code on 99 blazer I found with my own scanner. I put the new sensor and take my blazer to a mechanic who has a scanner like yours and find the code p0463 but not on my scanner the mechanic says that NEED TO assambly unit to resolve the p0452 to pass the test are actually related these two codes? even if the fuel gauge is fine?

@henrikloiske8572 4 года назад

I have an P0460 fault code on my Ford Focus Flexifuel and the wires going in to the tank is GN/OG(Volt) BK(Ground) WH/RD and BN/RD wich i think is the signal wire and signal ground.... Has Ford the same procedure with constant +5V to the signal wire?? really need your advise ;)

@ScannerDanner 12 лет назад

@fivefortyeye540i Thank you very much for the comment on my book! I owe you one for that.

@steves5355 3 года назад

For just over 2 months mine quits working, next day or so works..over and over and over..it's it malfunctioning before fully crapping out, or do I have a ground that is going bad, I know bad stock grounds happen, especially in an 06.. buddy has my multimeter and no scan tool. Just curious. Last thing I wabna do is throw money at a bad ground. Does anyone know the local to the pump/sending unit ground is located?

@epstein_slayer677 11 месяцев назад

I'm a second year auto student. I've got a 1998 chevy s10 with no dtc's, fuel gauge reads empty. All tests on sending unit are good. All tests on pcm circuit are good. I can't find a diagram for pcm to gauge in cluster. How do I test the circuit from pcm to the actual gauge? Is it on data bus? This vehicle has multiple gauges that do not work and some that do work. the cluster has been replaced. Any help would be appreciated.

@Brandi.Nicole 3 года назад

Just argued that it’s not my wiring it’s the sending unit with a brand new Car Quest part. Part shop argued with “ten years we have never had a faulty fuel pump” Well buddy I didn’t have a PCM reading until I put your crap part in my truck. Furthermore I never had a gauge problem until I installed the cheap part. I don’t have a computer 😩 I’ll go back through and check again but I swear it’s that new part I just put in.

@henrikloiske8572 4 года назад

If i have the correct info it seems that the Instrument cluster in my Ford Focus controls the fuel level sensor...i am beginning to suspect that my Instrument Cluster is the culprit ?? i had 0 Volts in both the WH/RD and the BN/RD cales...and the display in the IC says Fuel computer data error ??

@bmb1455 2 года назад

I have a very odd issue with my express van currently. ive gone through every diag in the book (that im aware of) Send wire has 5v, ground is good. multiple brand new sending units, same error. if i operate the float outside of the tank, all gauges work properly. as i am lowering the pump into the tank, all is good. shows correct level and voltage. as soon as the pump is fully seated in the ring, the gauge defaults to empty almost like the float is being held down. i have had my arm in the tank, no obstructions. any idea what i might be missing? when the sending unit is mounted in the tank the voltage says around 2.5v but operates from .7 to 2.5 when sitting outside the tank not submerged. grounds are good, ive had this same issue with 4 diff ecms, 3 pumps, 3 clusters, 2 different wiring harnesses. only thing that has never been swapped out is the tank itself. i even tried running my own ground straight to the tank.

@ScannerDanner 12 лет назад

@JohnzCarz Great point, thank you! I didn't check the gauge on this one, I should have.

@ScannerDanner 11 лет назад

lol stupid autocorrect. pins not pans

@chotuusian4127 Год назад

Good work

@odongohenry4863 6 месяцев назад

Yes Paul I like your content absolutely but a quick one can't we have a problem between the computer and the guage? in this scenario

@shaunsautorepairs5410 4 года назад

Electrical 101...always a learning day when you have a s/d video to watch

@flakdawg 8 лет назад

Wow!!! Thanks ScannerDanner! Great lesson!

@ScannerDanner 12 лет назад

@MrMatthew1969 Thanks for the comment.

@livemusic8248 6 лет назад

I have the code P0463 he has given me college ed now to troubleshoot aand correct the code

@felplayvina 12 лет назад

Mr Danner so every thermistor can be jump it without damage the circuit, but thermistor on cars be always 30.000 ohms cold? or can be variable?.

@johnnymalicoat754 3 года назад

Hey paul. Why is the the fuel gague sending unit only 2 wire instead of 3 wire like every other sensor?

@mrwashur1991 4 года назад

I’ve got a 95 k1500 base with a gauge that’s stuck way past full after a new sending unit. Suspect bad ground or bad sending cable to gauge. Does this year work directly off sending unit or does it pass through ecm first?

@ScannerDanner 4 года назад

I think a 95 the sending unit works the gauge directly

@canspol 11 лет назад

that's a nice lecture..... Nice Video

@danb.3397 4 года назад

Very informative teaching BUT almost completely useless for a DIYer. Also teach how to use a cheap multimeter to do the same V reading.

@ScannerDanner 4 года назад

Not true at all. Understanding circuit design is key for any troubleshooting, no matter what tools you may or may not own. Literally everything I've shown can be done with a simple inexpensive scan tool and or digital multimeter.

@ScannerDanner 12 лет назад

I just sent you an email Andy

@alwayslearning6355 2 года назад

Replied by bikeril on topic 2018 gmc sierra denali - P0449 code. Just checked each port to ground: red wire reads 12v constant (venting and not venting) white reads 3v when venting and 0v when not venting From the scannerdanner forum. I wonder how we have 3v on the control wire when the solenoid is not commended on? The poster finds some resistance in the control wire. No current flow, no voltage drop.

@ScannerDanner 2 года назад

Solenoid is open and you're reading a bias voltage coming from the ECM through the control circuit. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Q8ZwxJYkYnc.html

@kasoziyasin-y1h 10 месяцев назад

Thanks very much.for your teaching.

@alekstolstoi 7 лет назад

hi danner, I have a 2003 mdx whit p0463 I check power and ground they good, somebody eels change the fuel pump and the dashboard, at this point I don't know what else could be wrong... need help!!!!!!!!

@derrickjarvis9376 7 лет назад

alekstolstoi I have a 2000 Camaro I bought 3weeks ago and when I crank it up the gas start pouring down from the top of the gas tank.it only comes out when I crank the car up?could Yu Tell me what's the problem is

@صلاحالحراصي-غ1ض 4 месяца назад

God has guide me to you. I can't even speak or write a comment. You are just amazing and I like your character. Recently I bought a tester and a multimeter willing to learn so I'm just a beginner 😅

@ScannerDanner 4 месяца назад

I'm glad The Almighty has my friend. I'll help you however I can.

@ScannerDanner 12 лет назад

@Bushougoma Great point. Thank you

@AlonSOAMAZING 7 лет назад

Wow I'm lost I have an 02 chevy blazer which fuel gage was working fine my transmission went out and I got it replaced that car got given back to me with the fuel gage on empty with no fuel , I filled her up and nothing also I had changed the fuel pump less than a year ago . I ended up using the warranty and once again replaced the fuel pump and started the car and the gage still did not work . All the other Gage's in my dash work except the fuel . I think it may be a short that the mechanic caused while putting the transmission and it grounded to something but I don't know where to look at . Either the purple wire or orange black wire . If the wire is above the transmission. I don't know how to access it

@ScannerDanner 7 лет назад

Not much I can help you with other than to tell you the purple wire is the signal wire for the gauge and the orange black is the signal (float) ground.

@ScannerDanner 12 лет назад

Thank you very much!

@BELHORIZON31 Год назад

Got an issue with ethanol about fuel floater reading, any idea ?

@kaliserv4377 3 года назад

I don't hear no one saying voltage drop they do know how ohm's law work do they

@jonathanp642 7 лет назад

what do you use for projector and to make it touch screen ?

@ScannerDanner 7 лет назад

It is called a SMARTboard

@Georg1979 12 лет назад

So if I unplug the connector, than I should measure 5V on the signal wire. I measured 0V. We digged out the PCM and checked the integrity of the wires, both were good. We couldn't measure any voltage at the PCM as well. It should be 5V with the connector unplugged, right? It's an ECT sensor I'm writing about. Symptoms: no CEL, car isn't OBD II (so no live data), car consumes around 50% more fuel than it used to. It's called a Suzuki Swift in Europe. Known for PCM failures. Could it be a bad PCM?

@boybravo689 3 года назад

Sir where is the connection of the light that goes to the instrument cluster

@mymechanicfriend6017 2 года назад

Mann... TOP NOTCH ASE A6 Material Here!!! I am definitely a fan!!!

@ScannerDanner 2 года назад

Thank you so much!

@ggaberaligmelcomAli 4 года назад

كيج السياره من ازوده بالوقود ما يعد صحيح يعني مايصعد للاخير علمآ الطوافه جديده ما هوه السبب السياره كيا أوبتيما 2012خليحي

@hughvanzyl549 3 года назад

Brilliant explanation. South Africa

@venturafredis 2 года назад

hello i have 2003 mitsubichi Eclipse 3.0 lenele mesure 1044.28 mv are this in good or bad

@ScannerDanner 2 года назад

? What's the gauge doing? What is your issue?

@salahkebi05 4 года назад

Hi, that's called a voltage divider Vout = (R2/R1+R2)*Vin. Vout is the voltage reading in the scan tool, R2 is the fuel sensor resistor and R1 is the one in the ECM....THANKS.

@ScannerDanner 12 лет назад

Thank you

@sanathmedagoda2912 4 года назад

my fuel gauge reading always full on ignition on, checked all the ground are ok, when I checked the resistant between the sending unit signal wire and the ground its read as zero ohms, what might be the problem, is it the fuel level sending unit bad?

@ScannerDanner 4 года назад

Sure sounds like it my friend

@nickayivor8432 2 года назад

What do you call KNOWLEDGEABLE and SUBSTANTIAL the answer is Sir ScannerDanner Brilliant video From the start to finish loved it. Thank you very much helpful information video. Take care and have a great day Sir ScannerDanner From Nick Ayivor from London England UK 🇬🇧

@dannysa503 6 лет назад

I have 2000 Audi tt with fuel gauge problem too. Relay,fuse,fuel pump and sending unit are good. I'mma about to check the instrument cluster next. Any ideas on what else it could be? Thanks. I bought a multimeter but I'm barely new on this. Can anyone guide me on how to check for resistance or checking if there is a short in the wiring? Please... Thanks 😃

@armory3379 3 года назад

Just what i found on RU-vid and this is very helpful to me , and mix that way , Scanner Danner Premium , with ...( Joe electronic schematics for auto) just right here ,Computer and troubleshooting understanding, schematics, pretty cool stuff!

@Georg1979 12 лет назад

When my tank is full, the gauge shows ~80%. But as the tank empties it shows the fuel level more accurately. So my guess is that when the tank is full, than the sender has a low resistance and when it's almost empty the sender has high resistance. And my faulty full reading is beacause the connector at the tank is probably corroded, hence resisted somewhat. Causing the full readout to be unprecise, but the low level reading almost perfect. Am I right or wrong? (Tank needs to be dropped to check)

@keivanabdollahpour8737 Год назад

my 2010 Dodge Grand Caravan throws the same code, but the gauge works fine. I checked the live data and it shows me (fuel level1, left hand, and fuel level 2, right hand), which in my case the left hand one works fine and the fuel amount percentage is correct, but fuel level 2, right hand is fixed at 4.96 volt, which is triggering my code I assume, and I wonder what that is. Kindly please respond to my question if you could, thanks.

@keivanabdollahpour8737 Год назад

I assume there are two fuel pumps in my car?

@ScannerDanner Год назад

I'm not sure if you have two pumps on not. This is an AWD model right? Where the rear driveshaft splits the gas tank? Either way, if your tank level sensors are two wire designs, like in this video, you will be able to follow all the exact same tests. 4.96 volts on the scanner suggests an open circuit. Make sure you are reading the same 4.9 volts down at the sensor itself and then make sure your sensor ground is near 0v and if it is, you are done! Time to drop the tank. And while you are in there, change everything!

@gilbertjaramillo8735 Год назад

Super video. Now I can attempt to diagnosis my sender on my motorhome that reads empty. Like you said, if I disconnect the wire plug at the sending unit, I should read 5v with my meter to ground. Thank you!

@leepennington4649 4 года назад

I would have thought the fuel gauge would be a potentiometer rather than a thermistor. That’s interesting.

@ScannerDanner 4 года назад

Technically it is not a thermistor but the circuit is built like one on this vehicle

@s10rider07 11 лет назад

Hey i have a 2000 model s10, my fuel and engine temp have quit working at the same time, mileage counter and battery light only come on in acc position tested the cluster & its fine, replaced the body harness its good, idk what it could be...any suggestions to this commen problem with no answer?

@huangyi8451 2 года назад

What is up scottykilmer!!

@mugsymydog 5 лет назад

Paul having problem with 2004 Cadillac CTS. Had bad fuel pump no start condition, replaced pump vehicle now runs. Fuel gauge will not operate. Wiring diagram indicates one of the wire is a "LO REF". Could you tell me if that is a ground for sensor signal and if it is supposed to carry voltage. Both fuel sensor wire have 5 volts. it also has another sending unit because it is a saddle type tank. I just do not understand what a "LO REF" wire purpose is. Thanks

@ScannerDanner 5 лет назад

Low reference is the sensor ground my friend. If you have 5, 5, and 0 on a 3 wire sensor, you most likely have a bad sensor. (Sensor plugged in and backprobing)

@mugsymydog 5 лет назад

@@ScannerDanner Thanks for the reply. I followed your video to the "T" . This Cadillac has a saddle tank with a sender in each side. When I take the paper clip to the wires on both side scan tool fuel volt goes to "0" which per your instruction would verify wiring is good. However I get code for High voltage on fuel level sensor 1, fuel sensor 2 and also A/C pressure sensor which has high voltage code, All of these sensors share the lo reference wire I asked you about. Another strange thing is when I unplug both fuel level sensors the Verus still reads tank is 64% full when it should read 0 because there is no input or output with wires unplugged. I may have a probem with the ECM but I am stumped. Thanks again for your time.

@s10rider07 11 лет назад

i posted a video of the freeze frame data from my scan tool, after checking my grounds i found a missed ground wire & i also added two extra body to engine ground wires. still had the same results. i was wondering if this would help any.

@boybravo689 4 года назад

Is it applies to the potentiometer sensor that method Sir

@NOEISY1 12 лет назад

Hi Paul i having problems with temperature gauge on my ford Taurus v6 12 valves 2005,it goes all the way pass HI and sometimes go back to the middle.already replace the ECT sensor because i was told in this model doen't have Temp sender unit.it didn't fix the problem.what else can i do?

@s10rider07 11 лет назад

ok, using the freeze frame data on my scantool its giving me normal ect temp at 73deg, but it did say fuel sys 1: OL-Fault and fuel sys 2 N/A...does that mean that i have a problem at the fuel sending units end???

@all-about-programming 3 года назад

You the best cheater I always say the same... I

@majstorivan84 12 лет назад

ScanerDanner majstore pa ti si Bog! To translate it is :ScannerDanner master you are God :) your videos helped me so much in diagnosing bad wires or sensors etc.By the way i am mechanic working on Renault in Serbia for five years now.I've been so frustrated doing ohm testing that was leading nowhere.Than your voltage drop testing was like a light at the end of the tunnel.I actually solved a problem in 5 minutes that was driving my boss nuts for 2 hours.Thank you.Greetings from Serbia!!!

@mugsymydog 5 лет назад

Scannerdanner...I did change out sending unit which as stated earlier repaired no start condition but fuel gauge will not work. I know you told me it was the sensor after the test. On the primary pump it is a 4 wire connector ( Power, ground,fuel sens, lo ref) On the secondary unit it has a two wire just fuel level sens and Lo ref. did test as you directed and verus went to "0" on both sensors as i stated. Just trying to give as much info as possible. I have been battling this for weeks and cannot go use parts cannon. form the forums I read most people do and never fix problem including dealerships. thanks

@stephenkuper9549 11 лет назад

Scanner Danner Hope you can help! Have a 2.2 echotech 2005 Pontiac.Tempguage doesn't always park at the bottom when cold. But seems to go up to 90 degrees no matter where it decides to park at when cold. ex. If parks at 50 degrees will go up 90 degrees from there and sit at 100. If parks at 90 degrees will go up to what looks like180 degrees. Changed ect sensor twice, Not overheating. Thermostate opens. Coolant level normal, Fan works. Car appears to run normal. Only code is a Genric P0001 fuel volume regualator control circuit/open, Can't find in code book. Any ideas. headgasket, stepper motor, vac leak, guage (not digital), bad computer. Hellllp!

@trekvana 11 лет назад

Paul, to do the bypass test u said we need to disconnect the sender and jump the two wires. But to check the ground you said we need to leave the sender plugged in. The problem is i didnt see you unplug the connector for the bypass test. Was it unplugged for the bypass test and then plugged back in for the ground test?

@TheMattMan4494 3 года назад

Great instructor!

@ladillando1 12 лет назад

03 Mercury Sable GS fuel gauge needle to 1/2 scale with fuel tank full, empty half tank. I found the ground of unit sending was missing. I fixed, I replace unit sending, and fuel gauge, the problem still the same. Help me

@josemontes9050 8 лет назад

You can have another variable it could be a short from another 5v line to the fuel pump signal.

@alexdiosdado3736 3 года назад

What you mean another variable

@karthikch2163 8 лет назад

Hi.. Could you please test bench setup for validation of Fuel level gauge in cluster? by using following test cases 1). At full level, Empty level 2). At 75%, 50%, 35.5% fuel level indication in fuel level gauge 3. By create fault conditions like Primary sensor& Secondary sensors at High, Low. Both

@TheMr8bitmaster 9 лет назад

thx man u helped me a lot with many things...im studying to became a technician i have a year left to go..thx again man..simple and acurate..btw could it be easy to check if u have 5v on the wires ..for the wires integrity check...

@s10rider07 11 лет назад

i havent tried checking the sensors yet, but i have tried replacing the cluster with the original and it did the exact same thing....

@michaelbailey2393 3 года назад

What a perfect video for what I needed. Thank you for breaking this down! I have a 2016 cadillac ats-v and the gas guage doesn't work. hasn't worked since I've owned the car. I thought a new fuel pump would fix the issue; since I wanted to upgrade the fuel system. However it didn't fix the problem. Because of this video, I know exactly what to look for now. High 5 to you and your team!

@wayne3546 5 лет назад

Who does this pertain to a 2010 Chevy truck as well if so the orange and black wire I traced it to the map sensor as well because I do not know where it sat on that and e38 computer or can I just grounded in the ground elsewhere

@ironwill04 6 лет назад

Is this standard for most GM products in the same year range? If you have a cobalt that had this exact fuel gauge problem, then 2 days later the fuel pump starts getting weak and the car wont stay running; would this be considered a separate issue from the p0463?

@prmayner 11 лет назад

Would this be the same procedure for an 09? The gauge reads empty all the time. I checked at the connector and with a scanner, they both were reading normal i don't recall the exact #'s right now but the scanner was showing a level and my dvom had a voltage reading around 3 volts but Alldata in the description and operation says the ecm sends info to the bcm and on to the cluster but there is no bcm in the wiring diagram. at least the Alldata i have which goes to 07.

@andyfanshawe 12 лет назад

Hi Paul. Fantastic channel here. Very talented. Very jealous of your equipment! I am in the UK but lucky to own a 97 Lincoln Mark 8 with an erratic fuel gage. Tank sender been changed but is still erratic. Ford NGS shows 0.32V in Pids but at connector under the car is 2.1V? Supposedly sender transmits to message center, then goes to the instrument cluster via the network. Gage is driven fine from the scanner, although at 80% on scan tool, gage is reading full. No codes. Any advice?

@ejjimenez3753 12 лет назад

Danner thank you very much, and look at the continuity of the ground wire, 5v reference. and signal cable from the sensor to PCM all have continuity and this worries me because everything looks OK but the light does not go out and do not want to erase the code it takes to return 30 seconds. or follow all of your videos and you're definitely a great teacher I would love be one of your students