P0507

DTC P0507 Idle Speed High

Refer to Engine Control Schematics VSS .

Circuit Description

The throttle actuator motor is a TAC controlled DC motor located on the throttle body. The motor drives the throttle plates. To decrease idle speed, the TAC commands the throttle closed reducing air flow into the engine and the idle speed decreases. To increase idle speed, the TAC commands the throttle plates open allowing more air to bypass the throttle plates. If the Actual idle RPM does not match the Desired idle RPM within a calibrated time, this DTC will set.

Conditions for Running the DTC

* DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0171, P0172, P0174, P0175, P1120, P1220, and P1221 are not set.
* The engine running for at least 60 seconds.
* The engine coolant temperature is more than 60°C (140°F).
* The IAT is more than -10°C (14°F).
* BARO is more than 65 kPa.
* The system voltage is between 9.0 and 17.0 volts.
* The vehicle speed is less than 1 mph.
* APP Indicated Angle 0 percent.
* Idle speed is below desired RPM.

Conditions for Setting the DTC

* Conditions met for 5 seconds.
* The actual idle speed is 125 RPM more than the desired idle speed.

Action Taken When the DTC Sets

* The PCM will illuminate the malfunction indicator lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.
* The PCM will record operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information will be stored in Failure Records. If the diagnostic reports a failure on the second consecutive drive trip, the operating conditions at the time of failure will be written to Freeze Frame and the Failure record will be updated.

Conditions for Clearing the MIL/DTC

* The PCM will turn the MIL OFF after 3 consecutive drive trips that the diagnostic runs and does not fail.
* A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
* A History DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
* PCM battery voltage is interrupted.
* Using a scan tool

Diagnostic Aids

Using Freeze Frame and Failure Records data may aid in locating an intermittent condition. If the DTC cannot be duplicated, the information included in the Freeze Frame and Failure Records data can be useful in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also be used to determine how many ignition cycles the diagnostic reported a pass and a fail. Operate vehicle within the same Freeze Frame conditions (RPM, load, vehicle speed, temperature etc.) that were noted. This will isolate when the DTC failed. For intermittents, refer to Symptoms Symptoms.

Test Description

The number below refers to the step number on the diagnostic table.
2. This step determines whether or not the engine can achieve the commanded RPM, and if not, whether the RPM is too high or too low.