Throttle Actuator Control Motor Circuit Low Voltage
The P210C 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 reading suggests excessive resistance, a short to ground, or a failing actuator motor, which can lead to reduced throttle response or limp mode.
01. Most Common Causes
- Faulty throttle actuator control motor
- Wiring or connector issues (shorted or open circuit)
- Corroded or loose electrical connections
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or 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 throttle actuator wiring and connectors for damage or corrosion.
Step 3: Test throttle actuator motor resistance and voltage supply using a multimeter.
Step 4: Check for short to ground or open circuit in the control circuit.
Step 5: If wiring is OK, replace the throttle actuator assembly.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The vehicle may enter limp mode, limiting speed and acceleration, which can be dangerous in traffic.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the cause and vehicle make.