GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The electronic throttle control motor controls the idle speed by allowing a controlled amount of air to enter the intake manifold. Actual idle speed is continuously compared to commanded idle speed. This code will set if the actual speed is at least 200 rpm greater than the desired value or if the vehicle has experienced fuel cut-off more than three times during one idle period.

DTC Parameters

This code will set when the following conditions have been met:

    • IAT greater than 34°C (93°F)
    • ECT greater than 80°C (176°F)
    • EVAP diagnostic not running
    • AIR system diagnostic not running
    • Vehicle speed is less than 5 km/h (3 mph)
    • Actual engine rpm is 200 rpm higher than desired idle rpm
    • No ECT, EVAP, IAT, TP, or VSS DTCs set

P0507 is a (type B) DTC.

Diagnostic Aids

Verify this condition is not caused by the throttle body or a vacuum leak.

Check for a poor connection at the ECM or at the component.

Check for a damaged harness.


Object Number: 888303  Size: FP