P0507 - Idle Control System RPM Higher Than Expected

P0507 means idle speed is higher than the ECM expects. The fault is often caused by extra air entering the engine or throttle control not returning to the expected idle position, but throttle body faults, wiring issues, vacuum leaks, PCV leaks, intake leaks, or idle relearn problems can all create the same high-idle condition.

Treat the code as the starting point: compare symptoms, likely causes, and repair paths before pricing parts or moving into an estimate.

Code Overview

P0507 means idle speed is higher than the ECM expects. The fault is often caused by extra air entering the engine or throttle control not returning to the expected idle position, but throttle body faults, wiring issues, vacuum leaks, PCV leaks, intake leaks, or idle relearn problems can all create the same high-idle condition.

Common Causes

• Dirty throttle body or sticking throttle plate
• Vacuum leak letting in extra air
• Idle relearn needed after battery or throttle service
• Throttle actuator or idle-control fault

Symptoms

• Idle speed stays higher than normal
• RPM hangs or flares between shifts or when coming to a stop
• Idle surge or unstable idle speed

Diagnostic Steps

1. Inspect the intake tract and vacuum hoses for unmetered air leaks
2. Inspect and clean the throttle body if carbon buildup is present
3. Perform the idle or throttle relearn procedure if the vehicle requires it
4. Review throttle-angle and idle-control data before replacing parts

Diagnostic Insight

P0507 should be treated as a high-idle airflow and throttle-control problem before replacing the throttle body.

• Carbon buildup, throttle-body sticking, or an incomplete idle relearn are common first checks.
• If idle stays high after throttle inspection, vacuum, PCV, and intake leaks should move up the list quickly.
• Commanded throttle angle, actual throttle position, and idle behavior should be reviewed before parts are replaced.

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use symptoms, scan data, and quick checks to confirm the likely repair path before pricing parts. The estimator helps compare repair paths before replacing anything unnecessarily.

Related OBD Codes

Browse nearby code-family pages when the same fault pattern overlaps across systems, such as misfire, lean fuel trim, EVAP sealing, cooling, or charging faults.

Next Steps

Move from code lookup to diagnosis, then estimate the likely repair only after symptoms, causes, and checks point to the same path.