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.
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Common Next Steps
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Compare trims at idle, 2500 RPM, and cruise before pricing sensors.
Check intake boots, PCV hoses, and post-MAF leak paths.
Inspect MAF contamination and airflow data after intake leaks are considered.
Look for cracked ducts, loose clamps, and unmetered air after the MAF.
Related Inspection
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
- Inspect the intake tract and vacuum hoses for unmetered air leaks
- Inspect and clean the throttle body if carbon buildup is present
- Perform the idle or throttle relearn procedure if the vehicle requires it
- 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
Confirm the repair path before pricing parts.
Start here when carbon buildup or a sticking throttle plate is visible and the throttle body still responds correctly.
Use this when cleaning, inspection, and relearn are needed before replacement is justified.
Move here when idle stays high after throttle inspection or fuel trims suggest extra air.
Price this when throttle data, sticking, or actuator testing confirms the assembly is the fault.
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Next Steps
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