DTC P0507: IDLE SPEED - HIGH Chevrolet Venture I

Note. For circuit reference, see WIRING DIAGRAMS article.

Circuit Description

The Idle Air Control (IAC) valve is controlled by the Powertrain Control Module (PCM). PCM uses the IAC to maintain a desired idle speed, which varies depending on input to PCM. Scan tool reads IAC valve pintle position in counts. The higher the counts, the more air that is allowed to by-pass the throttle plate.

Conditions for setting this DTC are as follows

1. No CKP, ECT, IAT, MAF, MAP, TP, VSS sensor DTCs set.
2. No EVAP solenoid, EVAP system, fuel trim, fuel injector, EGR flow or EGR pintle position DTCs set.
3. ECT greater than 158°F (70°C).
4. Engine running at least 2 minutes.
5. Vehicle speed less than 3 MPH.
6. IAT greater than 0°F (-18°C).
7. Throttle less than 1.5 percent.
8. BARO greater than 65 kPa.