Symptom Definition
Engine starts but will not run at idle. Engine will run if accelerator is held at part throttle.
Possible Cause & Correction Check the following:
- Problem is most likely in Idle Air Control (IAC) system. See DIAGNOSTIC AIDS in CODE 35 chart in appropriate TESTS W/CODES article.
- Check EGR system.
- Check Park/Neutral switch.
- Disconnect MAP sensor. If condition is corrected, replace sensor.