Powertrain
generic / SAE
P2112
Throttle Actuator Control System — Stuck Closed
The throttle plate cannot be commanded open. The engine stays at idle or stalls under load. Often caused by a seized motor, broken gear, or heavy carbon coking inside the throttle bore.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 12
Possible causes
- Throttle plate seized closed high
- Throttle motor seized or gear broken medium
- Carbon or debris buildup preventing free movement low
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–700 €
- Estimated time: 0.5–3 h
- Component: throttle body
- Component: throttle actuator motor
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012