P0510
PowertrainThrottle Positionmoderate severityClosed Throttle Position Switch
What P0510 Means
The closed throttle position switch is not reading correctly. The PCM can't verify when the throttle is fully closed at idle.
Symptoms
- Check engine light on
- Rough or unstable idle
- Poor throttle response
Common Causes
- Faulty closed throttle position switch
- Dirty or worn throttle body
- Wiring or connector fault
- Misadjusted throttle switch
Diagnostic Steps
- Scan throttle position data
- Inspect throttle switch and connector
- Verify closed throttle signal at idle
- Test switch wiring for opens or shorts
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