P0443 Faulty PCM Diagnosis

[@winkingchick]

I like the way you walked through your thought process and backed it up with your self-made, custom designed troubleshooting checklist. Although this seems out of my scope, I learned a lot from seeing how you organized this diagnosis. Thank you!

[@davidstoner2864]

Finally! Someone explained this correctly! Too many parts store employees sell the purge solenoid like it’s going to fix the issue. Cracked hose, broken wire, leaking filler neck, will all throw the same code.

[@djflawlessexecution2679]

Where did you get all that info on your car from? Like the schismatics and color ID of each wire? This is exactly what i need to trouble shoot my electrical demons in my Saturn Outlook but there is absolutely nothing available even the Haynes Manual has nothing after i bought it >:/ To have it on paper and on ur tab makes it so much more easier. Any help would be greatly appreciated. Cheers

[@btcsys]

I would like to know the same thing. Where can I get my hands on those types of diagrams?

[@edwardthayer9386]

May I ask where you printed them skimatics from? Thank you

[@jaymeschappy1965]

schematic ?

[@glasser2819]

schematic and DTC, TSB, etc...: mitchell1.com or alldatadiy.com 👍🏻

[@rigatonidanza]

@@glasser2819 are they free or do you have to pay?

[@UBBERTANKER]

did you check all the pcm grounds and 12v supplies before a new pcm i check all the grounds and 12v inputs

[@jimbuford4147]

+UBBERTANKER I am with you. I guess we will know soon.

[@DanielJaegerFilms]

+UBBERTANKER Yes, and you are absolutely correct. That is the first thing you always check when a PCM is suspected to be faulty. Loose/bad grounds can cause the most bizarre problems, haha!

[@g50stang72]

Awesome vid. I am going through this issue at the moment. Great info!

[@Dwq47]

Oh man.... I hope you still check comments lol. Got one for you... I have 1.75v at the purge valve connector and 1.75v at the harness. Do you think it’s a corroded or faulty PCM?

[@jimbuford4147]

I am interesting in knowing if the new pcm solved the problem or if you were too hasty in making the call. Otherwise good video.

[@DanielJaegerFilms]

+Jim Buford It did solve the problem, I haven't gotten around to uploading the video of the fix yet.

[@poioq89]

@@DanielJaegerFilms we are waiting for the video please

[@SamuelAdams2203]

Daniel, was your references and notes from AllDataDIY?

[@abochavez]

I’m working on a 2000 Merc with same code. Solenoid was shorted but also reads ground on ground side without command from scan tool and graph of duty cycle is not showing square wave

[@WilliamJoseph2015]

You said the pcm is a plug to play. no need to program. do you have any videos demonstrating replacing it? on this model or similar?

[@Andruwey]

I have this problem in a Ford Mustang gt 4.6 p0443

[@dianamayor29]

OMG SAME but i have a v6

[@Thepolishszar48]

Dude, i dont know one thing about cars but you are amazing, you are a vehicle genius and if i lived by you i would only go to you for all of my service, i wish you could work on my 04 xterra with 121k, seriously.... you are hands down the best, i need to meet you

[@markferraro5250]

what type of scan tool are you using with your ipad?

[@ishmaelwilliams304]

Did you have to activate purge valve to get ground or do it ground to pcm when key is on?

[@snorman1911]

What do you mean exactly by "ground through the PCM"?

[@mikesullivane30]

snorman1911 the electricity should flow just through the wires. Somewhere on that circuit, inside the PCM the wire has shorted out, and the short is in the PCM and not external. The only way to fix it is to replace the PCM

[@glasser2819]

@@mikesullivane30 the PCM has an electronic switch to control open or ground... but it sometimes gets stuck in between: with a blown .50¢ transistor - Replace it and your good to go. or... replace the computer and blow it up again by bad solenoid... expensive way !!😂

[@Enforcer10rocks]

Great video, really enjoy watching!

[@jeepguy95]

Isn't P044x codes usually due to a leak in the emissions system? I have an '02 Jeep Grand Cherokee with a P0442 code and it's an emissions small leak code.

[@daytonkoop2841]

What scan tool software are you using on your iPad and we're did you get the obd2 data connector?

[@abochavez]

So normally there should be zero voltage on the ground side with connector unplugged correct?

[@rogerbernsen4877]

Daniel, well thought out video... Can the PCM come out through the Engine bay , or did you have to go through the passenger compartment?

[@rogerbernsen4877]

Thank you

[@rogerbernsen4877]

Did you ever make the PCM replacement video?

[@Thewatcher19190]

What website do you use for troublshooting

[@kellypark007]

How you doing sir what's the PCM your problem and how would the car Act with them codes

[@SCSautomotive.1988]

Very helpful video

[@jaymeschappy1965]

Make sure you keep your map sensor and mass airflow sensor clean and never use a magnetic oil drain plug.

[@hyphycoyote7002]

Jaymes Chappy why not use magnetic drain plug?

[@johnnellis3025]

No magnetic drain plug? why?

[@johnnellis3025]

@@hyphycoyote7002 Did you ever find out?

[@TepigmanMessgaming]

Did replacement of the pcm solve it??

[@DanielJaegerFilms]

+Mess112 Gaming It sure did! I have a video coming soon! :D

[@WilliamJoseph2015]

DanielJaegerFilms excellent video. I don't have all that fancy testing technology but I've been expecting a faulty pcm because I get all kinds of dashboard lights along with erratic electrical problems like power seats moving on their own or door open lights when doors are closed. I thought the car was demonic possessed but I realize it just has a bad brain :)

[@joemarotta2237]

So well explained, and I would bet I'm having the same issue with my 99 Durango, PO443. The purge valve runs some times and not others, engine running.. I'll check the voltage from the hot on the valve and ground. Now the PCM controls the ground, so if the ground is weak the 12v+ will also be weak, I believe is what your describing. If I'm reading you wrong you might be kind to let me know. I'll review the last part of video again. Thanks so much.. From Joe M

[@conor8321]

Inconceivable!!

[@jtoddk98]

Man thats an old iPad hahaha.

[@TJC450]

First thing I noticed myself lol

[@DanielJaegerFilms]

+jtoddk98 Yup! It's a first gen 64GB, had a price tag of $800!

[@EpicC64]

+jtoddk98 Ewww, burn that old iPad.

[@rundylucas7194]

I have a doubt the p0443 in honda accord can be the reason that the hot air does not work

[@TepigmanMessgaming]

Nice

[@poioq89]

Subscribed

[@bobbyjohnson1204]

WOW

[@rickyparker]

He

[@rundylucas7194]

I have a doubt the p0443 in honda accord can be the reason that the hot air does not work

[@daniellave4932]

I have the exact same issue In my 05 Acura TL 9 MPG 😂 help me please what can I do