P0507

DTC P0507

Description

The DTC P0507 Idle Speed High diagnostic monitors the engine speed. The powertrain control module (PCM) controls the throttle actuator control (TAC) motor in order to regulate the air flow through the throttle body. The amount of air flowing through the throttle body determines the engine speed. If there is a malfunction in the TAC system, an intake air leak, or other engine control system fault, DTC P0507 can set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0507 Idle Speed High

Conditions for Running the DTC

* DTCs P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0171, P0172, P0174, P0175, P0222, P0223, P0300-P0306, P0401, P0404, P0506, P1128, P1129, P2100, P2101, P2108, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2227, P2228, P2229, P2413, and U0107 are not set.
* Battery voltage is at least 10.5 volts.
* Engine coolant temperature (ECT) is at least 69°C (156°F).
* Intake air temperature (IAT) sensor 2 is at least 0°C (32°F).
* The engine has been running at least 15 seconds.
* Engine is running in Closed Loop at idle.
* The throttle valve is fully closed.
* The vehicle is in PARK with all engine accessories turned OFF.
* DTC P0507 runs continuously when the above conditions are met.

Conditions for Setting the DTC

* The actual engine speed is 200 RPM more than the desired engine speed.
* The above condition exists for more than 20 seconds.

Action Taken When the DTC Sets

* The PCM illuminates the malfunction indicator lamp (MIL) after 2 consecutive ignition cycles in which the diagnostic runs with the fault active.
* The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Freeze Frame buffer.

Conditions for Clearing the MIL/DTC

* The MIL turns OFF after 3 consecutively passing trips without a fault present.
* A history DTC clears after 40 consecutive warm-up cycles without a fault.
* Perform the scan tool Clear DTC Information function.

Diagnostic Aids

For an intermittent malfunction refer to Intermittent Conditions. Intermittent Conditions

If the DTC P0507 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

Test Description

Step 1 - Step 7:

The numbers below refer to the step numbers in the diagnostic table.
1. The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
2. This step prompts the technician to check for any condition that can affect the ability of the TAC motor to control engine idle speed. A DTC P0507 can set even if there is no fault in the TAC system. Any condition that can affect the idle speed of the engine must be repaired first, in order to enable proper diagnosis of the DTC P0507.
4. This step tests whether the PCM can operate the TAC motor with the scan tool. The TAC motor can be commanded to increase and/or decrease engine speed by using the scan tool Engine Speed Control function. The Engine Speed Control function of the scan tool is disabled when the engine temperature is less than 85°C (185°F).