2017 Subaru WRX diagnosis

This 2017 Subaru WRX lays down on hard acceleration when the engine is hot. The ATS eSCAN ELITE, eSCOPE ELITE, and the iGA5 ELITE Gas Analyzer are used for the diagnosis.

[@8power0]

THIS IS OUTSTANDING INFORMATION , I THINK WITH CLASSES FROM ATS , ALL TECHS CAN BECOME MASTERS !!!!!!!!!!!!!!

[@gerardotorres8872]

Yes sir, right equipment ..

[@tjmhlw]

Mr Thomson you sir are in a league of your own

[@PineHollowAutoDiagnostics]

I'm here to see Bernie do some massive turbo launches :D

[@richardcranium5839]

jealous???

[@PineHollowAutoDiagnostics]

Great diagnosis Bernie! My question is why couldn't you just use the downstream O2 to check the accuracy of the upstream AFR via scan data in 5 minutes? if it was lean enough to fall on its face, certainly the downstream would show a low voltage and prove that the AFR is lying?

[@NewLevelAuto]

What if the Cat were no longer as efficient? 🤔

[@PineHollowAutoDiagnostics]

@@NewLevelAuto haha Keith with the critical thinking question! I would think that it doesn't matter if the cat is there at all... Downstream would still fairly quickly show a real rich or lean condition that is present for more than a few seconds 😁

[@PineHollowAutoDiagnostics]

@@OtisPlunk I wish Bernie would answer some of these questions 😅

[@pinpointautomotiverepair1592]

Hmmm....if the cat was no longer efficient and had low oxygen storage capacity theoretically it would make this one easier no? If the catalyst had good oxygen storage potential you would think that it could potentially keep the upstream high during the lean event making it hard to use the downstream to cross reference the AFR... a bad cat would potentially allow you to catch it....pardon me while my brain explodes.

[@PineHollowAutoDiagnostics]

@@pinpointautomotiverepair1592 lol! If a gas analyzer in the tailpipe can pick it up, the downstream 02 would certainly do so as well. In fact it would be faster to react than any gas analyzer 😉

[@JoesAutoElectric]

You're a wealth of knowledge, Bernie. Love watching these videos.

[@WeakPiggy]

Joe I'm so glad to see a post from you. Worried something happened cause I dont see any youtube updates. Hope all is good buddy

[@justinhayward5027]

i would work for free for this guy. just to learn!

[@baja-automotive]

I’m watching this video again for reference and understanding of the ATS tooling. Almost have enough money to buy one🎉 During the test drive the camera man shows the boost gauge. This car is tuned😂 The waste gate tables are turned up, most likely some cheap Cobb off the shelf map. OEM tables will taper the boost off after peak, even at WOT, to prevent pre detonation. Over all this tune burned the AFR sensor I wouldn’t be surprised if the owner deleted the EGR too. Still a great video to reference❤

[@vickenkaragozian2041]

Bernie's explanation is the best so far. The scope & the Escan are amazing. Planning to buy the Escan soon.Thank Bernie for everything.

[@billbrock5486]

I'm retired but If I was starting out learning from ATS and using the tools would have made me a fantastic technician. Of course when I had a shop we were still changing points and condensers. Working on wiring was mostly to fix window switches or replacing harnesses on some vans that tended to melt wires due to excessive heat.

[@jrmg5556]

how come this channel is not over 100k subscribers? congrats again for the valuable videos!

[@thesmartguy3523]

Because not many like to learn and be told how they're doing it is generally wrong or not exactly the right way to do it

[@tonymai1844]

I did not think the wraf sensor can make that no power on this car. Now the heater circuit amp and the signal from that wraf sensor could make that much different. Wow, scope again, the gas analyzer also show CO for rich condition, and lamda number is very needed to compare the number from the reading from the engine ECU data. thanks Mr. Bernie It was so much to learn.

[@centrotecnicoautomotriz302]

Great diagnostics, valuable information on the operation of oxygen sensors. Your input is appreciated. Happy 2022!

[@RAVETOR]

The master is back!

[@Lambros_Stefaneas]

This just on time training DVD that they are selling, are top level. I highly recommend them, to professional technicians. lots of information to learn.

[@serge1060]

Great video and another wealth of information to digest. Thank you Bernie.

[@Wisdom-jp4qe]

Really happy to see you again sir

[@bobneuman8124]

These videos are great learning tools ! Keep them coming Bernie, Thank You !

[@sergesimonov1767]

Thank you! An accessible and understandable theory of the oxygen sensor!

[@yamaha37776]

I dig the new technology, great video as always Bernie!

[@TheAlex2769]

Hi Bernie. Very accurate diagnostic. Thanks again

[@theadmiral5425]

Thanks Bernie for the 2 videos at the end explaining the operation of the sensors. Another great video...Happy New Year to you and ATS

[@chelseacallahan2265]

awesome job Mr Bernie!

[@PaulHigginbothamSr]

Good job Bernie. It is the laf or Raf and I could certainly see it. A heater matters that much. I found in college chemistry that temperature really is critically important in chemical reaction quickness. Keep doing other shops failures because those might also be me and your more correct process is what I need to do.

[@rodvan-zeller6360]

How timely , around 3 weeks ago I posted using this procedure on D.N. . It is nice to get validation from Bernie , I add one more p.i.d. to the data ,the rear O.2 sensor. Also ,I talked about this with a couple of techs it was a little challenging for them to understand how the fuel trims can be good with a bad sensor, the easiest explanation is that the e.c.m. has no way of knowing the sensor is out of range until it gets very bad and than it may flag some codes based on rationality tests. Thanks for the great video.

[@turningwrenchesautorepairm5017]

It's good you posted this info. 5 gas tool is great to have but the rear 02 pid would have snitched on the front a/f sensor under a heavy load

[@lorrinbarth1969]

I remember when these cars were new and in the press pool. The universal complaint was tuning. The car would pull one minute and not the next. Now we know why.

[@Rawr454]

im always excited to learn from your videos thank you Bernie.

[@busbqbill449]

The best. Awesome. Awesome.

[@tam1381]

My head hurts but thanks Bernie.

[@giovannivanegas1305]

He is the best of the bests

[@delcorick9967]

Superb! Really did a good job explaining, thanks for video!

[@JACKATTACKED]

Merry Christmas and a Happy New Year Bernie 👍👌👏👏👏👏🔩⚙️🔧

[@mattw1393]

Great video. I would have been curious to see the old wide band reporting fine vs the post cat o2 probably being stuck lean.

[@84combat]

Excellent point. They should report the same with a short delay

[@PineHollowAutoDiagnostics]

Exactly!

[@herbertwatson1245]

Always look forward to this vids

[@agoodneighborautorepair2176]

Hi 👋Sir super nice explanation and information, blessings

[@baxrok2.]

Confusing since with the new sensor the reading still dropped to .72/.99 under load. Thanks Bernie!

[@Jpilgrim30]

Definitely. The gas analyzer was pretty critical in diagnosing this one.

[@Absolutepower9]

A lot of info to digest, thank you so much!

[@MechanicTechnicianRepair]

eslente dianostic master nice videio felis navida

[@fascistpedant758]

Doesn't this car have post cat O2 sensors? why not consult S2 to evaluate S1?

[@bluedeckelectronics]

Great video ! Thank you !

[@KERTER21]

Question - Wonder if the Factory scan tool has a pid for O2 current?

[@bartscave]

Doesn't the ECM go into open loop under wide open throttle? Wouldn't it ignore the RAF during this time?

[@elpelonsitoelpelonsito3227]

Thank you very much.

[@richardpancham7556]

Great work as always.

[@Pablo_Automotive]

Thanks a lot for this class

[@wadihakim5252]

god bless you genius

[@rodvan-zeller6360]

Very curious about mode 6 data on the front sensor.

[@rochestertommy9995]

I hope this guy is wealthy from all his knowledge and technology

[@nedhirdouiri]

Can anyone explain to me plz HHhH in this video the LAF and the WRAF sensor are the same ?!! And why the WRAF is not cycling ?! Could it be the post cat sensor ? Even when it 's cycling it is showing a very slow respond .. Do I need to watch the video once again HHH ?!

[@nigelbiscombe9199]

Who did the videos voice over at the end. Baz luhrmann lol

[@nedimbasic7823]

Would the car be in check engine mode . What kind code would it throw out. Thank You

[@cromag31]

I have a 2017 wrx. I decided to put brighter led light bulbs in the ceiling and the lights blew out! so the stock bulbs were put back in and they constantly stay on! now what?

[@hnd2893]

Is your ceiling/room light switch in the On position? There are 3 positions, On, Off and Door. Are you referring to the middle ceiling light or the map light near the rear view mirror? The interior lights get their power from the BIU (body integrated unit) you can screw the BIU up real quick if you use bulbs not rated for the circuit. The interior lights are grounded through the switch to the body. Double check your bulb install.

[@phareztrinimand]

So question cars use o2 sensors at WOT open loop

[@marion1600]

Wide open throttle it stays in closed loop?

[@michaelpiecewicz9748]

I have a question about the affect of the cat on the gasses coming out the tailpipe vs. the gasses in the 02 sensor?

[@yellow57projectxxx]

I was thinking the same thing. How can it be the same if the cat is burning o2 and hcs

[@lawsautomotive108]

We just bought a snap on 5 gas analyzer for the snap-on Zeus that we're using. But we're looking to upgrade snap-on doesn't have a 8 channel lab scope and the ATS does; is going to be the one we're looking at. We see the price of how much the e-scope Elite 8 is but how much is the five gas analyzer that you just had in this video?

[@rodvan-zeller6360]

(I left out back probing the the sensor itself , An excellent extra step)

[@shawnbauman5463]

Did he compare the AF and rear 02 or did I miss something.

[@prashanshan7125]

Yeah did he miss rear O2 sensor comparison..

[@PineHollowAutoDiagnostics]

That should have been step #1! Looks like it was a good opportunity to show the fancy 5 gas analyzer 😄

[@RAVETOR]

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