Diagnosing a 2007 Volvo XC70

[@elefanny1106]

The Bern Bern Bern. The Berns the Word.

[@PineHollowAutoDiagnostics]

Very interesting diagnosis, Bernie! In my experience Volvos are very picky about fuel pressure. If the fuel pump duty cycle is not what is expected for the desired psi/volume, a rationality code is very quick to set. Looking at the FP duty cycle on the scanner is a giveaway :)

[@screamingflat6]

Go back to Russia 😂

[@billsmith2212]

I am surprised they didn't change the spare tire - we changed everything under the hood - the problem MUST be in the trunk ! Great diagnosis and fix . Data , logic , training and experience .

[@kennedysgarage3281]

I love your methodical data driven fault finding process.Bernie you are on another level. I just love it, everyday is a school day 👍👍

[@kirkabrahamson1148]

That EScan is such a powerful tool. Another great example of diagnosing the correct way. Thanks Bernie

[@baxrok2.]

Another outstanding example of following the data. Thanks ATS!

[@jgeorges3061]

Bernie, thanks for all the information u sharing really eye opener for a lot of people like me.

[@Arphand]

Thanks for doing what you do Bernie.

[@jackfoster8319]

Bernie and ATS are spot on for diagnostics.

[@jakeandrus690]

Thanks for sharing, excellent work

[@eduardofrederico]

Fantástico, professor. Melhor diagnóstico que vi até hoje. Gostei muito dos equipamentos também. Não conhecia nem o scanner e nem o osciloscópio. Aqui no Brasil eu trabalho com o scanner PDL 5600 da SUN e com o osciloscópio MTPro 4.1. Parabéns e vou continuar assistindo aos seus vídeos para aprender mais.

[@cullenmiller8170]

I guess that’s what happens when you’re spit balling instead of properly diagnosing the problem. Thanks Bernie. I wish I was 30 years younger and healthy. I would go into that field versus heavy equipment that ruined my body.

[@robertmedina6875]

yeah it sucks to have your body ruin them right there with you. I have been studying diagnosis because that's something they're not many people can do and I can still do it even though my body is wrecked. Good luck! I wish you the best!

[@cullenmiller8170]

@@robertmedina6875 Thanks, all the best to you too.

[@ghostwrench2292]

My guess is the previous shop properly diagnosed it (faulty fuel pressure sensor) but put on an aftermarket FPS (Volvo's work best with Volvo parts) and then began chasing a ghost fault. Many years wrenching at Volvo dealers, I can't tell you how many times I saw this exact scenario - part from local parts shop, Ebay, Amazon, etc...I put Volvo sensor on and car is fixed.

[@cullenmiller8170]

@@ghostwrench2292 I would think if they had correctly diagnosed it to start with they should have realized the part they installed was bad. I guess it's easy to armchair quarterback after the fact. It seems to be a common issue these days to get bad aftermarket parts.

[@IAMNOSLEEP]

Thanks for sharing Bernie... Cheers.

[@stewartboucaud9919]

Awesome. You make it so easy.

[@blitzbeast16]

Keep up the great videos, i learn so much, and love how you explain every detail down to the principal, so that I can completely understand it.

[@AwakeDude911]

i dont know 1 thing hes talking about be he seems real happy ...so im happy

[@Phantomas2011]

Your a genius it’s a pleasure watching you work 😀

[@reallyhappenings5597]

I own a P2 Volvo and this is over my head

[@gerardjones7881]

you need vida, it will show fuel trims. go to mathews volvo forums and ask.

[@mobilerichie2009]

Really common part to fail on the P2 Volvo's....the FPS.....

[@johnmattiazzo3900]

Don't you find Bernie that aftermarket parts just don't work on these modern cars you need to use oem parts from the manufacturer its what i have found personally

[@weldingjunkie]

I think I saw this one 6 mo ago....Nice job Bernie very interesting that the computer thought it was getting the right pressure even tho it wasn’t. A scope nowadays is 100% needed IMO a scan tool would of lied.

[@alexanderorozco661]

🙏 thank you

[@robertferrara4529]

incredible. Thanks

[@mikechiodetti4482]

Thank you Bernie.

[@vickenkaragozian2041]

I've seen this video before. Still great one

[@robertmedina6875]

Darn it Bernie! I am doing my best to follow along with you . I love your videos. You must have 100s of thousands of hrs studing and work with diagnosis. We appreciate your videos! I have been working on cars on and off for 30 years. I did mostly tune ups , brakes,suspension, intake and pretty basic mechanical type stuff. I have been studying electrical trouble shooting. I have been studying with Paul Danner. Is there any video series training or books you can recommend? Thank you for your time! I am sure all of here on the channel appreciate you! I do!

[@MechanicTechnicianRepair]

Experience diagnosis. Tec. Nice video

[@eliteautomotivediagnostics4424]

Nice work Bernie, would be interesting to see what the fault originally was. Likely the sensor was the first thing changed and then they changed everything else from there. At some point "something" must have gotten better but still leaving the poor quality part that they installed.

[@rmautodiag]

Top level diagnostics! Great video👍

[@martymurphy9627]

As always, Awesome, Bernie.

[@aymenmohamed1134]

Awesome

[@santiagojimenez547]

Very impressed!!

[@juweekhan]

Great video if you could explain in simple terms a bit more how and what figures are good bad when you ruled out air and followed the fuel side I am a little slow your videos are much appreciated keep up the good work

[@billrimmer5596]

So Bernies rollin in a yellow Hummer. Nice way to get the tools to the shop😂😂

[@DooMHaMMeR247]

You state facts , does the escan work for diesel vehicles as well?

[@turbo8711]

Great videos. Where can I purchase this scantool?

[@jdtractorman7445]

An aftermarket part by chance? I hate using aftermarket parts, especially the electrical parts.

[@upnorthballa]

Didnt this video come out once?

[@Lambros_Stefaneas]

well done.

[@bartscave]

After you put the old fuel pressure sensor in should you reset fuel trims so your next test doesn't show the correction from the faulty one?

[@Sangueffusor]

It isn't really necessary, as the ECM will re-learn the fuel trims on its own

[@juanportillo2201]

No need with the Escan. The Escan records long term+short term fuel trims. This is the reason the Escan shows green(1-10%) fuel trim squares after putting the old sensor. In regards to the car itself, it does not take long for the ECM to relearn fuel trim on a specific cell. The car just need to be driven at different loads/rpm to relearn every fuel trim cell.

[@Troy_Built]

You can check to see if it's actually fixed by just seeing if the trims basically zero each other out. Once you erase codes if it's not fixed you may wish you had them back.

[@arielatom03]

Wait i saw this a few weeks ago. Is this a reupload?

[@rimmersbryggeri]

Maybe they never put the new sensor on? Maybe they removed the old one andput it back by accident.

[@DependableAutoTruck]

does the escann work on the newer chryslers 2018 and up or do you have to pay the money to autoauth

[@eli310]

ur pressure transducer was reading about 25 on the rail nd the pressure sensor was reading 45 the old sensor was reading 40-45 what did the used fuel pressure sensor relearn its value to ? it should relearned about 25 pressure right to match ur scope on the transducer

[@Sangueffusor]

The ECM is using the fuel rail pressure (FRP) sensor to determine how fast it should command the fuel pump to spin. If the computer thinks it's getting 45 PSI on the rail, but the "new FRP sensor" is reading incorrectly, the ECM won't command the fuel pump to spin fast enough to actually get 45 PSI - it will only get about 25 PSI, as measured by the ATS pressure transducer connected to the Schrader valve on the fuel rail. Once the old (working) FRP sensor was installed, both the ATS pressure transducer and the FRP sensor read the same value, 45 PSI - this meant that the ECM was able to correctly command the fuel pump to actually produce a rail pressure of 45 PSI.

[@eli310]

@@Sangueffusor the transducer never read 45 psi

[@Sangueffusor]

@@eli310 It did at 14:20 which is when he hooked the yellow channel back up to the ATS transducer (it actually read between 40-45 PSI)

[@eli310]

@@Sangueffusor thats a 4 pin relay theres no reading of the pressure transducer thats the reading of the pressure sensor

[@eli310]

look at 12:12

[@ismarmeskovic]

👍👍👍 thanks for the video mr.thompson!

[@reallyhappenings5597]

How to learn how to do this?

[@Lambros_Stefaneas]

is anyone own the escan, to tell us your opinion about the product?

[@8power0]

TWO-PART PROBLEM, THAT SHOP NEEDS GOOD SERVICE INFORMATION IF THEY HAD GOOD INFORMATION THEY COULD HAVE LOOKED UP THE SENSOR SPECS AND KNOW WHAT THEY WERE LOOKING AT. THANKS, MISTER THOMPSON.

[@gerardjones7881]

dont buy parts from rock auto, they will fail right out of the box. Blue box or salvage yard OEM only.

[@Phantomas2011]

Your a genius it’s a pleasure watching you work 😀