The P2112: Throttle Actuator Control System – Stuck Closed fault code indicates that the throttle actuator control system is stuck in the closed position, preventing the throttle from opening as required. This can lead to reduced engine performance or stalling. The issue may be caused by a faulty throttle actuator, actuator control module, or wiring problems.
P2112 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2112: Throttle Actuator Control System – Stuck Closed |
| Is it serious? | Yes, a stuck throttle actuator can prevent the vehicle from accelerating and may lead to poor drivability or engine stalling. |
| Possible causes | – Throttle actuator control system stuck in the closed position – Faulty throttle actuator – Issues with the actuator control module |
| How to diagnose? | – Inspect and test the throttle actuator for sticking – Check the actuator control module – Verify wiring and connections |
P2112 Meaning
The P2112 fault code means that the throttle actuator control system is unable to move the throttle plate from the closed position. This can occur when the throttle actuator motor is stuck, or the control module is not sending the correct signals to open the throttle. The vehicle may experience poor throttle response, reduced power, or even stalling.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional related codes that might provide more context about the throttle actuator issue. | OBD-II Scanner |
| Inspect the Throttle Actuator for Sticking | Visually inspect the throttle actuator and throttle body for signs of sticking or debris buildup that could prevent the throttle from opening. Manually move the throttle to test for smooth operation. | Flashlight, Basic Hand Tools |
| Test the Throttle Actuator Motor | Use a multimeter or diagnostic tool to test the throttle actuator motor’s operation. Ensure it is receiving the correct signals and is able to move through its full range of motion. | Multimeter, Diagnostic Tool |
| Check the Actuator Control Module | Use a diagnostic tool to check the actuator control module for any faults. Ensure it is correctly communicating with the throttle actuator. | Diagnostic Tool |
| Inspect Wiring and Connections | Inspect the wiring and connectors between the throttle actuator, control module, and ECM for loose connections, corrosion, or damage that could cause the actuator to remain stuck. | Flashlight, Multimeter |
| Repair or Replace Faulty Components | If a faulty throttle actuator, control module, or wiring is found, repair or replace the affected components to restore proper throttle control. | Replacement Parts, Tools |
| Clear the Code and Test Drive | After repairs, clear the fault code using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved. | OBD-II Scanner, Vehicle Manual |
| Recheck for Codes | After the test drive, rescan the vehicle to ensure the P2112 code does not return. | OBD-II Scanner |
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