What Does P2112 Mean?
The PCM has detected that the electronic throttle body is stuck in a closed or nearly closed position. This results in severe lack of engine power, poor acceleration, and possible stalling.
Safety Warning
Vehicle will have severely limited power and may stall in traffic, creating hazardous conditions. May not accelerate sufficiently to merge or avoid hazards safely.
Common Causes
40%
Carbon buildup preventing throttle plate from opening
25%
Failed throttle actuator motor unable to open throttle plate
20%
Throttle plate binding or seized due to damaged shaft or bushings
10%
PCM entering limp mode due to other sensor faults or internal PCM failure
5%
Corroded or damaged wiring/connectors at throttle body preventing signal transmission
Diagnostic Steps
1
Step 1: Inspect throttle body for excessive carbon deposits, ice buildup, or foreign material preventing opening
2
Step 2: Manually verify throttle plate moves freely through full range of motion with ignition off
3
Step 3: Monitor live throttle position data while commanding throttle open using bi-directional controls to verify actuator function
4
Step 4: Clean throttle body thoroughly and perform throttle relearn procedure per manufacturer specifications
5
Step 5: If throttle remains stuck after cleaning, replace throttle body assembly and verify all related sensor codes are cleared
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has detected that the electronic throttle body is stuck in a closed or nearly closed position. This results in severe lack of engine power, poor acceleration, and possible stalling.
The most common cause of P2112 (Throttle Actuator Control System - Stuck Closed) is: Carbon buildup preventing throttle plate from opening
Typical repair costs for P2112 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will have severely limited power and may stall in traffic, creating hazardous conditions. May not accelerate sufficiently to merge or avoid hazards safely.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2112 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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