P0225: Throttle/Pedal Position Sensor/Switch C Circuit Malfunction
Can you still drive? Drive with caution. The vehicle will likely be in reduced power mode. Have this repaired promptly as throttle control is safety-critical.
What Does P0225 Mean?
Code P0225 indicates a malfunction in the third throttle or pedal position sensor circuit. Some vehicles use a triple-redundant sensor system for throttle control, and this code means the third sensor is reporting values outside the expected range or is not correlating with the other sensors. This is a drive-by-wire safety concern.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty accelerator pedal position sensor assembly
- Wiring fault in the sensor C circuit
- Corroded connector at the pedal assembly
- Failed electronic throttle body
- Water intrusion in the pedal area
Symptoms
- Check engine light on
- Reduced power mode activated
- Throttle may feel unresponsive
- Inconsistent acceleration
- Vehicle may limit top speed
Diagnostic Steps
- 1Read freeze frame data and compare all throttle position sensor readings
- 2Monitor sensor C voltage through its full range of motion
- 3Inspect the accelerator pedal connector for corrosion or moisture
- 4Check wiring continuity between the pedal sensor and ECM
- 5Replace the pedal position sensor assembly if readings are erratic
Recommended Parts & Tools
accelerator pedal position sensor
throttle body assembly
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $150 - $600 |
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Chat with AI About P0225Commonly Affected Vehicles
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Frequently Asked Questions
Why do cars have three throttle position sensors?
Triple-redundant sensors are a safety feature in drive-by-wire throttle systems. The ECM compares all three readings and can detect if any single sensor is giving incorrect data, preventing unintended acceleration.
Can I replace just the pedal sensor or do I need the whole pedal assembly?
On most modern vehicles, the position sensors are integrated into the pedal assembly and are not separately replaceable. The entire accelerator pedal module must be replaced.
Community Fix Reports
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