DTC P1508 GMC
Idle Speed Low - IAC System Not Responding
Idle Speed Low - IAC System Not Responding
Description
DTC P0107, P0108, P0117, P0118, P0121, P0122, P0123 and P0500 not set, engine started, vehicle not moving, ECT sensor more than 122ºF, IAT sensor more than -13ºF, system voltage over 10.0v, engine runtime over 30 seconds, BARO sensor over 70 kPa, MAF sens
Cause and Solution
Base engine problem causing a slow or unstable idle speedFuel system is too rich or too leanIAC motor is damaged or has failed (it may be sticking)Throttle body plate or bore contaminated with foreign materialThrottle body adjustment screw tampere
Video Guide
Diagnostic Info
- DTC Code: P1508
- Brand: GMC