Throttle Actuator Control Motor Circuit Low
The P2102 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the throttle actuator control motor circuit. This motor is responsible for moving the throttle plate based on accelerator pedal input. A low voltage signal suggests a problem with the circuit, such as a short to ground, open circuit, or faulty actuator. This can lead to reduced engine power and improper throttle response.
1. Most Common Causes
- Faulty throttle actuator control motor
- Short to ground in the control circuit
- Open circuit in the wiring or connector
- Failed PCM (rare)
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 a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the throttle actuator wiring and connector for damage, corrosion, or loose connections.
Step 3: Test the throttle actuator motor resistance and voltage supply using a multimeter.
Step 4: Check for shorts to ground or opens in the circuit between the PCM and actuator.
Step 5: If wiring is okay, replace the throttle actuator assembly and clear codes.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P2102 as it can cause sudden loss of throttle control or stalling, leading to unsafe driving conditions. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the throttle actuator assembly needs replacement, which may cost $200-$500 including parts and labor.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.