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M35 Vq25Det Ecu Fault Codes List?

luthepa1

By luthepa1,
in Four Door Family & Wagoneers

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luthepa1 Contributor

luthepa1

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Hi All,

I am trying to find reference to a post here in the past for ECU fault codes but it seems to be gone. I just hooked up my laptop to the consult port (OBDII port) for a diagnostics run and sensor data logging to try and get an idea hopefully for a issue where my car intermittently and randomly blow some smoke. If my car could smoke a cigarette then its like it took a puff - lol.

Anyway I have fault code P0235 which I believe is turbo boost sensor? I recently bypassed the boost bleeder/controller as after recent mods with Criag's help my car was hitting 21psi. A little too high for kind of stock setup still. So I believe the code is for this sensor but I wanted to confirm incase is was for the other sensor that monitors boost pressure. I still have everything connected electronically. I just connected the inlet and outlet of the bleeder controller to each other (keep dust out), plugged the hole on the intake pipe and replaced the T with a stright through from inlet to waste gate actuator.

Any info on code 235 would eb great! Now to go for another test run for a speed trap test :woot:

thanks!

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scotty nm35 Grand Master

scotty nm35

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Posted

If the boost goes above 22psi it will throw that code. You can trick the sensor into seeing less pressure with a small air pressure regulator as I have done, or perhaps simply blocking it will work?

luthepa1 Contributor

luthepa1

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Well cleared the error code and went for a boost. On return home no errors reported. So suspect the err 235 was indeed because of exceeding 21psi but that's fixed now. 17psi flat across rev range.

But now I got some hunting to do. I tried performing a Idle Air Volume Learn function and it will not complete. Was data logging my run so got something to analyse. Might have a boost leak somewhere or maybe not. Maybe idling too high or read maybe fuel trims are out (hope I logged that).

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