Throttle Closed Position Performance
When commanded to idle, the throttle plate does not reach the calibrated closed position. Often a coked throttle bore preventing the plate from seating fully.
Affected components
- Throttle body
- Throttle actuator motor
Common causes
- High likelihood: Throttle bore coked at closed-position stop
- Medium likelihood: Plate or stop misadjusted after service
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.