OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2112?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyThrottle plate seized closed
- PossibleThrottle motor seized or gear broken
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Throttle Body, Throttle Actuator Motor
Related codes
- P2111Throttle Actuator Control System — Stuck Open
- P210FThrottle Actuator B Control System - Forced Limited RPM
- P2110Throttle Actuator Control System — Forced Limited RPM
- P2113Throttle Actuator Control System Forced Limited RPM
- P2114Throttle Actuator Control System Forced Below Limit RPM
- P2115Throttle/Pedal Position Sensor A Minimum Stop Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.