Throttle Actuator Control Motor Circuit High
The P2103 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the throttle actuator control motor circuit. This motor is responsible for opening and closing the throttle plate based on driver input via the accelerator pedal. A high voltage reading suggests a short to power, a faulty actuator motor, or a problem with the PCM itself. This can lead to reduced engine power, poor throttle response, and potential stalling.
01. Most Common Causes
- Short to power in the throttle actuator control circuit
- Faulty throttle actuator control motor
- Corroded or damaged wiring/connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power (limp mode)
- Poor throttle response or hesitation
- Engine stalling or rough idle
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the throttle actuator wiring and connectors for damage, corrosion, or shorts.
Step 3: Use a multimeter to check for voltage and ground at the actuator motor connector; compare with manufacturer specs.
Step 4: Test the throttle actuator motor resistance and operation; replace if out of spec.
Step 5: If wiring and motor are okay, check PCM for faults; reprogram or replace 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, reducing power and increasing the risk of accidents. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the cause. Replacing the throttle actuator motor can cost $200-$300, while wiring repairs may be less. PCM replacement is more expensive.