P2112
Throttle Actuator Control System Stuck Closed
The throttle plate is not opening the way the computer expects. That can make the car feel very weak, stall, or go into reduced power mode because air flow is being restricted.
- SEV
- 4/5
- DRIVE
- CAUTION
- DIY
- $20-$300
- SHOP
- $180-$900
Quick answer
AI-CITATION READYWhat it means
Can you drive with it?
Most common causes
- Throttle body carbon buildup or mechanical sticking
- Failed throttle actuator motor or internal throttle body fault
- Throttle position sensor or wiring problem causing false closed feedback
Typical repair cost
DIY usually runs $20-$300. Typical shop repair lands around $180-$900, depending on the root cause.
01 / Definition
P2112 means the PCM determined that throttle actuator control system A is stuck closed or unable to open as commanded. The cause may be a binding throttle plate, heavy carbon deposits, a failed actuator motor, wiring faults, or incorrect throttle position feedback.
02 / Drive status
With caution. The vehicle may barely respond to the accelerator and can stall in traffic. Limit driving until the throttle body and actuator system are tested because normal power may not be available.
03 / Symptoms
- Check engine light
- Reduced engine power
- Very poor acceleration
- Stalling
- Limp mode
04 / Causes
| 1 | Throttle body carbon buildup or mechanical sticking | high |
|---|---|---|
| 2 | Failed throttle actuator motor or internal throttle body fault | high |
| 3 | Throttle position sensor or wiring problem causing false closed feedback | medium |
| 4 | PCM or throttle control circuit issue | medium |
05 / Diagnostic sequence
- 01Confirm P2112 and note whether throttle opening is limited at idle or during pedal input.
- 02Check for related throttle, pedal, and sensor correlation codes.
- 03Inspect the throttle body for carbon buildup, damage, or a plate that binds when moved.
- 04Inspect the throttle body connector, wiring, and grounds for high resistance or corrosion.
- 05Compare commanded and actual throttle position with scan data or bidirectional tests.
06 / Repairs
| 1 | Clean the throttle body if deposits are keeping the plate from opening freely | $10-$80 |
|---|---|---|
| 2 | Repair throttle actuator wiring, connector, or ground faults | $20-$150 |
| 3 | Replace the throttle body assembly if the actuator motor or sensors fail testing | $150-$600 |
07 / Related codes
08 / FAQ
Can P2112 cause no acceleration?
Yes. If the throttle plate stays closed or barely opens, the engine may not respond when you press the accelerator.
Does a dirty throttle body cause P2112?
It can. Carbon buildup can make the plate stick and prevent the throttle from opening correctly.
Should the throttle body be cleaned before replacing it?
Usually yes, as long as the unit is not electronically failed or physically damaged.
How is P2112 different from P2111 or P2101?
P2112 means the throttle appears stuck closed or will not open enough. P2111 points the other way toward a throttle that is hanging open, while P2101 is the broader throttle motor range/performance code.
09 / Source and method
- DATA BASIS
- OBD-II REFERENCE + OBD2.HELP
- METHOD
- STATIC VALIDATION
- SAFETY
- INFORMATIONAL
This page combines OBD-II diagnostic reference data with OBD2.help generated diagnostic guidance for code meaning, likely causes, and repair direction.
Publishing uses deterministic schema and build validation, plus manual spot checks on representative pages before release.
Safety-critical diagnosis and repairs should be confirmed with a qualified mechanic, especially when the vehicle is misfiring, overheating, or losing power.