P0507: Idle Control System RPM Higher Than Expected

The P0507 error code stands for "Idle Control System RPM Higher Than Expected." This code is triggered when the engine control module (ECM) detects that the engine's idle speed is higher than the manufacturer's specifications. This situation can result from a malfunctioning idle air control valve, a vacuum leak, or other issues affecting the air-fuel mixture.

Importance of addressing P0507

Addressing this code is crucial because an excessively high idle speed can lead to various performance issues. Decreased fuel efficiency, increased emissions, and potential engine wear are symptoms of this error. A higher-than-normal idle can also affect your safety while driving, making it difficult to control the vehicle during acceleration or deceleration.

Can I safely drive my car with this error code?

While it is possible to drive a vehicle with the P0507 code, it is not recommended. The high idle speed can cause excessive engine wear, reduced fuel economy, and potential overheating. Most importantly, the vehicle's behavior may be unpredictable, making it challenging to operate safely in traffic.

Common symptoms of P0507

• Illuminated check engine light
• Higher than normal engine rpm at idle
• Rough or unstable idle
• Increased fuel consumption
• Difficulty in controlling vehicle speed

Diagnosing P0507

To diagnose the P0507 error code, technicians typically follow these steps:

• Use an OBD-II scanner: Retrieve the P0507 code along with any additional codes that may provide insight into the issue.
• Inspect idle air control valve: Check the idle air control valve for proper function. A faulty or stuck value can cause high idle speeds.
• Check for vacuum leaks: Examine vacuum hoses and connections for leaks that could introduce excess air into the intake manifold.
• Examine throttle position sensor (TPS): Verify that the TPS is functioning correctly because improper readings can affect idle speed.
• Test engine parameters: Monitor live data from the engine control unit (ECU) to assess rpm, the idle air control valve position and other relevant parameters.

Repairing P0507

Common repair methods for the P0507 error code include:

• Clean or replace the idle air control valve: If the valve is dirty or malfunctioning, cleaning or replacing it can restore proper idle control.
• Repair vacuum leaks: Fix any damaged vacuum hoses or connections to eliminate excess air intake.
• Adjust throttle position sensor: If the TPS is misaligned or malfunctioning, adjusting or replacing it can help regulate idle speed.
• Inspect and clean the throttle body: A dirty throttle body can affect idle control, so cleaning it may resolve the issue.
• Reset and test: After repairs, clear the error code and perform a test drive to ensure that the idle speed returns to normal and the code does not reappear.

Related reading

Follow the link below to reach our diagnostic check engine trouble codes catalog:
On-board diagnostics (OBD-II) trouble code directory