P0507

Diagnostic Chart:

Schematic:

The PCM controls the air entering into the engine with an Idle Air Control (IAC) valve. To increase the idle rpm, the PCM commands the pintle inside of the IAC valve away from the throttle body seat. This allows more air to bypass the throttle blade. To decrease the rpm, the PCM commands the pintle towards the throttle body seat. This reduces the amount of air bypassing the throttle blade. A Scan tool will read the IAC valve pintle position in counts. The higher the counts, the greater the airflow that bypasses the throttle blade.

DTC PARAMETERS
DTC P0507 will set if idle speed is above desired idle speed by more than 60 rpm for greater than 12.5 seconds and the following conditions have been met:
^ DTCs P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0171, P0172, P0201 - P0204, P0300, P0301, P0302, P0303, P0304, P0336, P0440, P0442, P0446, P0452, P0453, P0480, P0481, P0502, P0503, P1133 and P1441 are not set.
^ IAC command is less than 2 counts.
^ BARO is greater than 72 kPa.
^ Engine Coolant Temperature (ECT) is greater than 40°C (104°F).
^ The battery voltage is between 11.6 and 17 volts.
^ Idle has stabilized for 5 seconds.
^ Engine run time is greater than 20 seconds.

DIAGNOSTIC AIDS
^ Inspect the IAC valve electrical connection for proper mating.
^ Inspect the wiring harness for damage.
^ Inspect for a disconnected, cracked, or cut vacuum hose.
^ Inspect for the proper installation of the crankcase ventilation valve.
^ Inspect the intake manifold and the throttle body for leaks.
^ Inspect the intake manifold for cracks.
^ Refer to "Rough, Unstable, or Incorrect Idle Stalling". Rough, Unstable, or Incorrect Idle and Stalling