Diagnostic trouble code

P0507 Idle Air Control System RPM Higher Than Expected

Idle speed is higher than the PCM expects.

Throttle & Idle Control Codes

Read This First

This code identifies the failed diagnostic test or circuit family. Confirm the basic checks before replacing parts, and keep freeze-frame data until the repair is verified.

Common Checks

  • Check for vacuum leaks, sticking throttle body, or throttle cable issues on older cars.
  • Inspect electronic throttle data and pedal/throttle codes on later cars.
  • Look for unmetered air after the MAF.

Common Repairs

  • Repair vacuum leaks or sticking throttle components.
  • Clean throttle deposits and perform relearn if required.
  • Repair electronic-throttle faults shown by companion codes.

Mustang Notes

Model-Year Applicability

Listed for 1996 and newer traditional gasoline Mustang pages in this first-pass catalog. Engine, calibration, and Ford-specific codes may narrow that range as more service data is added.

Sources

  1. SAE J2012DA Digital Annex of Diagnostic Trouble Code Definitions
  2. 1996 Ford Mustang Owner Guide