codes 12,32 & 35 (Full Version)

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codes 12,32 & 35

  

Whutdidyousay -> codes 12,32 & 35 (10/13/2007 6:15:07 PM)

can someone let me know what these codes really mean? would any of them cause a no start problem?

(edit)It's a '93 Jimmy 4x4 automatic

code 12......?
code 32 EGR circuit error
code 35 injection pulse width error - short
Again thanks alot to whoever can shed some light on what I need to fix.

  
swartlkk -> RE: codes 12,32 & 35 (10/13/2007 6:38:27 PM)

I'm going out on a limb and making the statement that you have a '93 4.3L Vin W CPI engine (orange vortec on a plastic cover on top of the engine) and not a Vin Z TBI motor (round air cleaner).  Reason being, code 35 is not a valid code for a TBI motor.

12 just means that the codes completed normally.

32 - This means that when the PCM commanded the EGR valve to open/close, there was no change in the fuel mixture as sensed by the PCM.

35 - Idle Air Control (IAC) System - most likely a problem with the idle air control valve located in the throttle body.

So for code 32, I recommend that you remove and clean the EGR valve.  If the EGR valve is stuck open and the IAC valve is not functioning properly, it could cause a no start.  How was it idling before you started having this no-start issue?

Whutdidyousay -> RE: codes 12,32 & 35 (10/13/2007 6:47:43 PM)

yes you are correct, I have a CPI fuel system with the orange Vortec on the cover. I'll try and clean the EGR valve if I can get it off (haven't looked yet) do I just use carb cleaner?
the truck idled good and drove fine except a lil studder when taking off fast, then it started acting like it was out of gas.... Thanks for the help

swartlkk -> RE: codes 12,32 & 35 (10/13/2007 6:53:07 PM)

Any regular carbon cleaner can be used so long as it specifically states sensor safe.  This is more to keep the cleaning agent from damaging your O2 sensor as it exits the engine after you have cleaned the valve.

You may want to pull the throttle body and give it a thorough cleaning as well.  Just make sure that you get a new gasket for both the throttle body and the EGR valve before you start the work!

Whutdidyousay -> RE: codes 12,32 & 35 (10/13/2007 10:20:15 PM)

I can't seem to find a gasket for the throttle body, is there another name for it? the guys a t the parts store look at me like I'm retarded..... maybe a part # too

Chevy Lover -> RE: codes 12,32 & 35 (10/13/2007 10:33:33 PM)

It's just called a throttle body base gasket.
I would think that any parts man would know that.

swartlkk -> RE: codes 12,32 & 35 (10/14/2007 5:56:07 AM)

Seems I may have sent you on a wild goose chase...  I never really paid attention on the CPI motors, but it looks like the TB may not be removeable separate from the upper plenum...

Anyway, the IAC valve is located above where the intake ductwork connects to the throttle body.  You will want to remove the IAC valve and clean out it's bore very well.  Then remove the intake duct work and clean what you can through the throttle body.

With the EGR valve gasket, if you can, get one with the integrated screen.  I know that you can get it at Napa, but don't know about other places.

Whutdidyousay -> RE: codes 12,32 & 35 (10/15/2007 7:25:22 PM)

where is the EGR valve located?... What does it look like? It all looks greek to me under that hood, I'm an old VW guy tryin to get my jimmy runnin again
(Nevermind, I found it)

  

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