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 sensor signals and commanding the throttle plate accordingly. A processor failure can lead to loss of communication between the pedal and throttle body, causing the engine to enter a reduced power or limp mode. This issue is often due to internal electronic failure, corrosion, or voltage irregularities.
1. Most Common Causes
- Faulty throttle actuator control module
- Corroded or damaged wiring/connectors to TAC module
- Low battery voltage or charging system issues
- Internal processor failure due to heat or age
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power (limp mode)
- Poor throttle response or hesitation
- Engine stalling or rough idle
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm P2107 and check for other related codes.
Step 2: Inspect the TAC module wiring and connectors for corrosion, damage, or loose connections.
Step 3: Test battery voltage and charging system; ensure voltage is stable (12.6V+ engine off, 13.5-14.5V running).
Step 4: If wiring and voltage are OK, replace the throttle actuator control module (often integrated into the throttle body or ECM).
4. 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, increasing the risk of accidents, especially in traffic or on highways.
How much does it cost to fix?▼
Repair costs range from $150 to $400, including parts (TAC module or throttle body assembly) and labor. Diagnostic fees may add $50-$100.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.