CHEVY EXPRESS VAN 5 VOLT REFERENCE FAULT DIAGNOSIS AND FIX

[@DJ7mph]

I know this is 2 years old. I watched multiple videos on 5 volt reference. This was simple and made sense. You were the only one that mentioned 5v 1 being the same circuit. I thought each 5v1 was it's own circuit. I had 4 failed sensors. All on 5v1. Cam sensor had an internal ground short causing disruption to the 5v circuit for all.

[@johnjohannemann1220]

Another successful diagnosis and repair. As a master a SE and Ford technician it’s refreshing watching your videos. It’s nice that you share your expertise and craft with everyone. Thank you for what you do for the industry.

[@justinfrye1741]

Way to trace them circuits! and finding the source of the actual problem the right way... That's what makes or breaks a good technician and that's what brings the business back and two thumbs up to u keep up the good work we need more guys doing this in several fields if I might add...

[@alexklaus8438]

Great video and diagnosis! When ever a vehicle comes in with trash everywhere I just pile it away from where I'm working and leave it there.

[@rubengarcia6920]

Alex Klaus me to we had a horder. That used to get mad if we moved trash from where it was and it was under the gas pedal and brake pedal it was dangerous

[@guidomack79]

Dude you got to keep rolling with these videos. Twice now in the past year you've helped me out just wish I could help in return maybe someday.

[@spelunkerd]

Eric, I'm almost caught up, having binge watched your channel over the past few weeks. Great diagnostics, clear thinking, brilliant channel. My mom always told me to surround myself with smart people, ha ha.

[@ADVANCEDLEVELAUTO]

Thank you! I truly appreciate your continued support for the channel.

[@yassinehmaimou3373]

All mechanics in the world needs to watch your videos , you are the best one bro......keep going 😉😉😉 ( Morroco )

[@adventures223]

Keep these videos up i am binge watching i am learning so much so quickly you explain and show everything so its easy to understand

[@EARTHKEENING]

I love 5 v reference cases study it's always interesting and challenging , I have a customer 2008 GMC Savana 3500 and have only 1 code for P0641 only and the dashboard says reduced engine speed and nothing else and I have to work on it tomorrow have no idea where to start lol . amazing video btw thanks for sharing 🙏.

[@thamiralqurashi8604]

watching your channel for few days , its one of the best , keep the good work , Greeting from Saudi Arabia

[@ADVANCEDLEVELAUTO]

Thank you!

[@ATSNorthernMI]

When I was in automotive paint sales, our old work van would start hesitating and stalling randomly and for a long time we couldn't figure out why after many trips to the shop. They replaced the fuel pump, coil, plugs, wires, practically shooting the parts cannon. The main mechanic gave my boss a promise of all that was holy he would figure it out and went meticulously through harness after harness until he found that when they smashed the harness up between the engine and the firewall, the harness was starting to rub out and one of the 5v reference lines was shorting to ground dropping a whole bunch of systems out and causing the ecu to loose signal of the camshaft and crankshaft sensors.

[@Cantante1963]

Thank you,Eric. I’ve Learned so much watching your videos.

[@themechanic6117]

Another great video. Smart choice on deciding to chase the oil pressure code👍

[@ADVANCEDLEVELAUTO]

Thank you!

[@jimthecarguy]

Nice diagnoses and repair. Keep up the good work

[@ADVANCEDLEVELAUTO]

Thank you for watching!

[@aday1637]

I've got the same power probe torch and it always works every time I go for it. Snap on, not so much.

[@jasonc.4683]

HEAT AND VIBRATION. How many people know who says that alot 😂😂. Awesome work my friend

[@ADVANCEDLEVELAUTO]

Thank you!

[@charlesforte6473]

Nice Work Sir !!! Electrical/wiring can be a nightmare, especially on vans. I'm still learning to trace and use schematics but you made it look damn near simple ! I'm 2 years late but had to subscribe ! Thanks !!! Cf

[@billyyoder8171]

Thank you Eric. Good job. Have a blessed and safe week.

[@ADVANCEDLEVELAUTO]

Thank you!

[@sandyande]

Great diagnostic cheers sandy

[@ADVANCEDLEVELAUTO]

Thank you!

[@私は自動車修理工だ]

Great job man, great job... 👍🏼👍🏼👍🏼👍🏼 I'm a mexican car technician... Respect. Greetings from Mexico!

[@arthurfricchione8119]

Eric, great troubleshooting and thanks for showing the schematic. Big plus for us Diyers on where to begin our troubleshooting process. Thanks for sharing your time and knowledge 👍👍👍

[@ADVANCEDLEVELAUTO]

Thanks for watching!

[@ishmaelpatel893]

You are the smartest guy on KZbin. I fix sandwiches too hey

[@ADVANCEDLEVELAUTO]

Thank you for watching!

[@ishmaelpatel893]

Make more videos, in time you’ll pass all of the channels. After 100000 subscribers ya get paid serious money..

[@ADVANCEDLEVELAUTO]

I wish lol

[@ishmaelpatel893]

Nothing is impossible, all the other channels are flakey as hell

[@juanrodriguez-ry6yt]

retired l1 master car and truck here you rock bro. just subscribed keep them coming

[@ADVANCEDLEVELAUTO]

Thank you!

[@rajushaikh9045]

Thank u sir very smart work Did not waste your time directly pin point

[@dennissecor8092]

Wow nice work, you are very thorough, great job, very impressed!!!!

[@drewbush6535]

Great video! Today my USB factory service manual is coming! I will check my harness preventive maintenance!

[@fire7765]

Awesome job, persistent pays off every time

[@sicelogeorgeson7212]

Great content.. im also busy with a chev captiva that has a 5v reference issue. No cignal to injectors, vehicle not starting.

[@anthonysova7117]

Just subscribed very good diagnosis 1 question the 5 volt reference comes from the ecm does the ecm time out I ask because u had the key off I’m a retired HVAC service tech worked on pneumatic systems and commercial refrigeration. Thanks

[@billsmith2212]

You got lucky with that wire finding the bad spot . GM should not run that harness so tight to potential trouble . Great work .

[@tgoodm1]

How did he get lucky? All the right things were done to arrive at the problem area.

[@ADVANCEDLEVELAUTO]

80% Skills and 20% Luck. Thanks for watching!

[@johnaclark1]

Checking at the computer would have proved it was broken between the computer and the oil pressure sensor but finding that wire definitely wasn't luck.

[@Joeelectronicschematicsforauto]

You have absolutely great electronics knowledge especially schematics love your channel

[@SS-U23]

Nice job Thank you for sharing this diagnosis procedure with us.

[@Christophergriffiths1972]

Nice work man! Process of elimination.

[@juansolis9409]

thank you i had the same code and it was my oil press, switch. good vid.

[@mellzeno6956]

Your videos helped me a lot appreciate you bro

[@JasonSpiffy]

Great video. Ive been binge watching all your videos that last dew days. lol

[@ADVANCEDLEVELAUTO]

Thank you for stopping by! I’ve got more videos coming soon.

[@bartscave]

Nice find tying the two codes together!

[@ADVANCEDLEVELAUTO]

Thank you!

[@MrSprintcat]

Awesome video.would the same thing happen if the pressure switch was bad? Thx

[@mohammedalharrasi1788]

Great vedio

[@unclemarksdiyauto]

Thanks for another great video! Would have loved to see you tackle the service airbag light/message.

[@feeneysmechanical6215]

Great diagnostic video

[@gm1258001]

Daamnn, surprised to see that type of a mess out of an electrician's truck. I would have expected this out of plumber's truck.

[@JS-ri2rx]

Another great video

[@CubasAutomotive]

Another great find & fix Eric! 👏👍

[@ADVANCEDLEVELAUTO]

Thank you!

[@odishoodisho4904]

Great as always thanks for sharing your knowledge

[@ADVANCEDLEVELAUTO]

Thanks for watching!

[@roxanneabbott8424]

Awesome job Eric!!!

[@ADVANCEDLEVELAUTO]

Thank you!

[@neverstoplearning382]

Just great my man. Thanks for sharing knowledge.

[@ADVANCEDLEVELAUTO]

Thank you for watching!

[@moebassidji8306]

great diagnostic.

[@jgeorges3061]

Eric, Awesome/Brilliant really enjoyable to watch and see how ur thought process is fixed that issue keep those videos coming and appreciate ur time and effort for showing all that. cheeeeers

[@ADVANCEDLEVELAUTO]

Thank you!

[@carslover3509]

Man it's great work im relay ienjoy with your case study great

[@ADVANCEDLEVELAUTO]

Thank you!

[@DylanRabier]

Great diag Eric. Nice find and explanation 👍 Man that van was disgusting 🤢

[@ADVANCEDLEVELAUTO]

Yeah, those workers obviously don’t have any respect for their company’s vehicles. Thanks for watching!

[@frankbuben5172]

Great video I work for a fleet and they trash the inside like that then when I move all there trash they complain to the boss lol

[@ADVANCEDLEVELAUTO]

Hahaha!

[@mrlara57]

What website do you use for wire diagram?

[@everydaywitkaycee]

Hi Eric , I have been watching your videos recently and they are quite helpful I must say . Could you help out in this situation? I bought a 2008 Chevy Express 1500 van 4.3 motor from IAAI auction ,Van ran until they stole the CAT and the welder burnt out ECU when welding exhaust together because he forgot to disconnect battery. Car won’t start , we’ve replaced ECU and TCM , nothing . Now we are looking to replacing ECM, TCM, and BCM . But we are not sure how to go about programming these new computers .Van is currently located in Africa . Is there a good tool you recommend that can diagnose these vehicles properly? What tool should we use to program these modules to start the Van ? Thank you .

[@elfillari]

Myself as DIY-guy this video gave me certainty to how trying to diagnose my P0641 fault of my Chevy! On my case its related on MAP-sensor. Could you tell on what scanning-tool you're using of diagnosis on this video? I've to order some unit as useful as yours!

[@garagetube2830]

bravo !

[@ADVANCEDLEVELAUTO]

Thank you!

[@23thebull]

Awesome video 👍💯

[@8power0]

THANKS FOR THE VIDEO , IS THERE NOT A SHORTER WAY OF TESTING A PROBLEM LIKE THIS . WHAT IF YOU COULD NOT FIND THE BREAK IN THE WIRE THE WAY YOU TESTED . HAVE YOU EVER TRIED WIRE TRACING WITH A TONE GENERATOR AND PROBE IT WOULD LOOK TO BE MUCH EASIER THAN DIGGING IN TO A FAR RESIST WIRE HARNESS . SOMETIMES THE SHORTEST ROUTE BETWEEN TWO LINES IS NOT THAT STRAIGHT OF A LINE .

[@ADVANCEDLEVELAUTO]

Yes there are plenty of other methods I could of used and often times do use. I just felt like there was a good chance the wiring was rubbing somewhere obvious. So I decided to quickly inspect the wiring harness. Thanks for watching!

[@teodorogoaran5006]

Ha ha ha,when I was watching your vídeo I had this other Safari GMC that has more ir less the same engine and wires same position, same problem ir is stalling I started the vehicle checking wires and boom there were the bare wires, anyways thanks for Sharing ,congrats.

[@Khans1199]

With the right flowchart repair steps, i think 5v should've been checked at pcm next if its giving out. Just a thought for proper diagnosis steps... 😊

[@sonofmontezuma3732]

At the Ford house the service writer will call customer (commercial vechiles only) and hv them come down and clean it out themselves or it a $1000 fee for us to clean it out. Had a customer while back claim that money was stolen when the truck was cleaned out ,after that the new policy came into place

[@ADVANCEDLEVELAUTO]

Not a bad idea lol. Thanks for watching!

[@CubasAutomotive]

I've always done that too. No way do I want to go through someone's nasty filth just so I can do my work. Construction vehicles & chicks always seemed to be the worst. Lol

[@sammalaa3258]

thank you eric great video

[@enriquenunez5464]

Can something in the charging system cause a similar problem? I get a battery light every once in a blue moon and it's gone the next time I restart the truck(03 Express 2500 5.3),but lately it's been stalling similar to your case randomly. I replaced the alternator a couple years ago with a new ac delco unit. I had a lean code recently, gonna check my harness and check for vacuum leak anything else you think I should check? Great video!

[@wagoosh78]

well done u explained it perfectly

[@ADVANCEDLEVELAUTO]

Thank you!

[@SomeGuyInSandy]

I did not know about oil pressure gauges until now. I was driving a (new to me) company Ford one time and looked down to see zero oil pressure. I freaked out and pulled over and immediately shut it down. I checked, and it was full of oil! I never trusted it after that.

[@rrmech11]

Nice job 👍👍

[@smms5056]

AWSOME MAN 🤑🤑 THANK YOU WELL DONE 👍👍

[@budimanjaya159]

What a mess ! what a dirty people they were ! looked like a barn to me, the fleet owner should hardly educate and punish the guys who used that truck !, Good Job Eric !

[@richardc6038]

Love this you tought me a lot

[@kdmq]

I had a Jeep that uses 10W-30 oil and would drive it in the winter in -30 C, and when you first start it up on a cold winter day it made 100 psi of oil pressure. I almost wonder if that's another reason for the dummy gauge cause people get worried when the oil pressure gauge pegs high.

[@didimilano2438]

great job!

[@twincam825]

Good fix.

[@3g2000gt]

Are you located in Socal brother?

[@caseycoker3039]

What website are you using for the wiring diagram. Thank you. Have a blessed day!

[@ADVANCEDLEVELAUTO]

Mitchell. Thank you for watching!

[@luismarty1685]

Thanks Eric.

[@markandkiminnewzealand2702]

I’m no Angel, but I would never let any vehicle I’m responsible for looking like that. Disgusting. Great fix. The plastic seems to be very brittle

[@dassme1]

Great job buddy 💪👏👍 I subscribe to you . I love finding electrical issues .

[@ADVANCEDLEVELAUTO]

Thank you for watching!

[@allimkhan7540]

That truck is so disgusting just because it's a work vehicle they should keep it clean great video !!!!

[@Nudnik1]

I had a 2003 4.3 vortec the Temperature sensor on side of head on drivers side 5v would short to ground same issue. Randomly would stall not start until cold. Sensor was damaged from someone change plugs cracked it.

[@maciejszmytkowski3741]

I enjoy video and all this professional troubleshooting . But mess and dirt inside this car ,I'll call first trash truck t o remove all this trash and clean this car before touch anything .Anyway thanks for great troubleshooting lesson

[@feeneysmechanical6215]

You pulled and broke the wire.lololol. that's a Keith DeFazio trick hahahaha

[@baxrok2.]

Nice job!

[@benjaminlevi7792]

Great video thanks

[@ADVANCEDLEVELAUTO]

Thank you!

[@billrimmer5596]

Great find!! Definitely enjoy the channel!! U had to really get in there!! Snakes?? Wow

[@ADVANCEDLEVELAUTO]

Thanks for watching!

[@LSXperts72]

Where do you get your wiring diagrams from?

[@EARTHKEENING]

I'm getting 5v to all my sensors to every pigtail end on all the car sensors 🤦. But I have 5v reference show on my scan P0651 and engine power reduced .I also have P0030 & P0050 .

[@sonofmontezuma3732]

You ever use a tone tool to help find those open circuits ???

[@ADVANCEDLEVELAUTO]

Yes, I have one. Maybe I'll make a video with it. Thanks for watching!

[@Plainstreamer]

Exelent video

[@jakhamdi1217]

Good job man

[@ADVANCEDLEVELAUTO]

Thank you!

[@33798]

You got it 💪

[@ishmaelpatel893]

I would throw everything away out of that truck and shrug my shoulders when investigated hahha

[@weichen2869]

Good job. Watch u next video.

[@ADVANCEDLEVELAUTO]

Thank you for watching!

[@jeremymatthews8087]

spot on fix with that van why are you bothering with a snap on soldering torch lot of there stuff is over priced cheap import now only the american made snap on is any good

[@robertmedina6875]

Dam your good!! Luv video!

[@beeurself2148]

Do you have anybody or recommend anybody in Dallas Texas

[@worroSfOretsevraH]

Any reason why you are always skipping air bag warning issues? Thanks.

[@IloveTurtlws]

Tks much

[@georgesontag2192]

I have seen a simple pin hole in the wire insulation cause a wire to corrode Water and salt gets in the wire. Can't even see it when looking close to it.

[@billyr9840]

Nice !

[@armandomoncada2180]

EXELENTE 😊🫡🫡