P0507 - Idle Control System RPM - Higher Than Expected
P0507 is a generic powertrain diagnostic trouble code indicating Idle Control System RPM - Higher Than Expected. It relates to the Vehicle Speed / Idle Control / Aux Inputs system.
DTC Breakdown (SAE J2012)
| System | Powertrain (P) |
| Type | Generic |
| Subsystem | Vehicle Speed / Idle Control / Aux Inputs |
| Fault Index | 07 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code P0507 mean?
The powertrain control module logged P0507 after detecting that the engine idle speed is higher than the targeted engine RPM. The PCM is unable to bring the idle down to the commanded speed.
Severity Level & Driveability Details
Severity: Moderate
Moderate. A high idle speed can cause increased fuel consumption and put extra strain on the brakes and transmission, but it will not cause immediate engine failure.
Common Symptoms of P0507
- Engine idle speed too high, too low, or fluctuating (surging).
- Engine stalls when coming to a stop or at idle.
- Rough engine idle or shaking.
- Check engine light illuminated.
Typical Causes for P0507
- Intake vacuum leaks downstream of the throttle body (vacuum lines, intake manifold gaskets).
- Dirty throttle body bore or carbon deposits on the throttle plate.
- Failing or sticking Idle Air Control (IAC) valve.
- PCM calibration issue or throttle position sensor fault.
Diagnostic and Troubleshooting Steps
Inspect for intake vacuum leaks using a smoke machine or propane test. Clean carbon buildup from the throttle body and IAC valve. Use a scan tool to monitor IAC duty cycle and commanded idle speed.
Typical Repairs and Fixes
- Repairing intake vacuum leaks.
- Cleaning carbon buildup from the throttle body and throttle plate.
- Replacing the faulty Idle Air Control (IAC) valve.
- Resetting the PCM idle speed memory or performing an idle relearn.
Sensor Location & Parts Involved
The Idle Air Control valve and throttle body are mounted on the intake manifold assembly.
Clearing Code & Recurrence
Reset codes to recalibrate the idle control memory.
Emissions & Smog Inspection Impact
Incorrect idle speeds can raise emissions during idle and increase fuel consumption.
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Related Diagnostic Codes
Sources & References
This diagnostic guide is compiled and verified against the following authority sources:
- EPA driveability standards
- NHTSA complaints portal
Frequently Asked Questions about P0507
What does the idle control system RPM higher than expected code P0507 mean?
The powertrain control module logged P0507 after detecting that the engine idle speed is higher than the targeted engine RPM. The PCM is unable to bring the idle down to the commanded speed.
Is it safe to drive with the idle control system RPM higher than expected code P0507 active?
Yes, but expect stalling at idle.
How much does it cost to repair a idle control system RPM higher than expected code P0507 fault?
Cleaning the throttle body is cheap ($15 for spray cleaner), vacuum leak repairs are $100-$300, and replacing the IAC valve costs $150-$400.
What are the common causes of the idle control system RPM higher than expected code P0507?
Trigger conditions for the idle control system RPM higher than expected code P0507 include: Intake vacuum leaks downstream of the throttle body (vacuum lines, intake manifold gaskets)., Dirty throttle body bore or carbon deposits on the throttle plate., Failing or sticking Idle Air Control (IAC) valve..
Can I clear the check engine light for idle control system RPM higher than expected code P0507?
Reset codes to recalibrate the idle control memory.
Will the idle control system RPM higher than expected code P0507 cause an inspection failure?
Incorrect idle speeds can raise emissions during idle and increase fuel consumption.