Throttle Actuator Control Module Processor Failure
The P2107 code indicates a malfunction in the throttle actuator control (TAC) module's internal processor. This module is responsible for interpreting the accelerator pedal position and controlling the throttle plate via an electric motor. A processor failure can lead to incorrect throttle response, reduced engine power, or a no-start condition. The issue may stem from internal module faults, wiring problems, or communication errors with the engine control module (ECM).
01. Most Common Causes
- Faulty throttle actuator control module
- Corroded or damaged wiring/connectors to TAC module
- ECM software or hardware failure
- Short circuit or open circuit in TAC module circuits
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or throttle response
- Engine stalling or no-start condition
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Inspect the TAC module wiring and connectors for damage, corrosion, or loose connections.
Step 3: Check for proper voltage and ground at the TAC module using a multimeter.
Step 4: Perform a TAC module relearn procedure if applicable.
Step 5: If all checks pass, replace the TAC module and reprogram if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may enter limp mode with reduced power, or stall unexpectedly, increasing the risk of an accident.
How much does it cost to fix?▼
The cost typically ranges from $200 to $600, including parts (TAC module) and labor. Diagnostic fees may add $100-$150.