lightfighter
NAXJA Forum User
- Location
- Nevada County CA
I got a check engine light a couple weeks ago. Scan tool showed P0505 Idle Air Control Circuit. It had a low idle (400-500 rpm) when cold but when warm it idles fine. Once it got colder it began stalling. Had to use the throttle to keep the idle up to warm up the engine before driving.
I swapped in two known good sensors. Problem got worse. I found out that that the computer is not controlling the IAC. Took it to a mechanic and learned that my IAC was bad however so is the ECM...
Just a heads up for a P0505 code. If you swap the sensor its either wiring, or the ECM. My mechanic said he has seen the ECM go bad in a lot of Cherokees before any wiring.
A re-manufactured or refurbished ECM is about $200... just spent $250 on diagnostics and a sensor... ARGH!
I swapped in two known good sensors. Problem got worse. I found out that that the computer is not controlling the IAC. Took it to a mechanic and learned that my IAC was bad however so is the ECM...
Just a heads up for a P0505 code. If you swap the sensor its either wiring, or the ECM. My mechanic said he has seen the ECM go bad in a lot of Cherokees before any wiring.
A re-manufactured or refurbished ECM is about $200... just spent $250 on diagnostics and a sensor... ARGH!