Throttle/Pedal Position Sensor Circuit High Voltage
Code P2133 indicates that the Engine Control Module (ECM) has detected a high voltage condition in the throttle/pedal position sensor circuit. This typically means the signal voltage from the sensor is above the expected range, often due to a short to voltage, a faulty sensor, or wiring issues. The ECM uses two sensor signals for redundancy; a mismatch or high voltage triggers this code.
1. Most Common Causes
- Faulty or worn accelerator pedal position sensor 'F'
- Short to voltage in the sensor circuit wiring
- Corroded, damaged, or bent pins in the sensor connector
- Excessive resistance in the sensor ground circuit
- Failed PCM (less common, but possible)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power (limp mode)
- Poor acceleration or hesitation
- Erratic throttle response
3. Step-by-Step Diagnosis
Step 1: Connect an OBD2 scanner and verify the code P2133. Check for additional codes.
Step 2: Visually inspect the throttle pedal and throttle body wiring and connectors for damage, corrosion, or loose connections.
Step 3: Using a multimeter, check the sensor reference voltage (typically 5V) and ground. Then measure signal voltage at idle and wide open throttle; compare to manufacturer specs.
Step 4: If signal voltage is high (e.g., above 4.5V at idle), disconnect the sensor and check if voltage drops. If it does, replace the sensor. If not, repair the short to voltage in the wiring.
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. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on whether it's a sensor replacement or wiring repair.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.