P0808
UniversalThe P0808 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the circuit for the Clutch Position Sensor.
Medium SeverityThis code signifies that the Clutch Position Sensor circuit is sending an abnormally high voltage signal to the engine's computer, indicating a potential electrical fault. This often means your vehicle may struggle to start, engage cruise control incorrectly, or experience other driveability issues related to clutch engagement detection.
⚠️ Before You Begin (Safety First)
Always ensure the vehicle is safely secured with the parking brake engaged before attempting any repairs. Disconnect the battery's negative terminal before working on electrical components to prevent accidental shorts or injury. Allow the engine and exhaust components to cool down before touching them.
Common Symptoms
- Engine will not crank or start (no-start condition)
- Cruise control fails to engage or disengage
- Vehicle stalls when coming to a stop
- Check Engine Light (CEL) illuminated
- Difficulty shifting gears (less common, but possible if PCM incorrectly interprets clutch position)
Common Causes
- Faulty Clutch Position Sensor
- Corroded or loose electrical connector at the sensor
- Damaged or chafed wiring in the sensor circuit
- Short to voltage in the sensor circuit
- Failed Powertrain Control Module (PCM) (rare)
Frequently reported on: Honda Civic (2006-2015), Ford Focus (2000-2011), Chevrolet Cobalt (2005-2010), Subaru Impreza (2008-2014), Volkswagen Jetta (2005-2010)
Diagnostic Steps
- Locate the Clutch Position Sensor: It is typically mounted on the clutch pedal assembly inside the cabin.
- Inspect the sensor and wiring: Visually check the sensor for physical damage and the wiring harness for signs of fraying, cuts, or corrosion. Ensure the connector is securely seated.
- Check for continuity and resistance: Using a multimeter, test the clutch position sensor according to your vehicle's service manual specifications. Look for proper resistance readings and ensure continuity in the circuit. A 'high' circuit code often points to an open circuit or a short to voltage.
- Test voltage at the connector: With the ignition on, check for reference voltage and ground at the sensor's electrical connector. Compare readings to service manual specifications.
- Replace the Clutch Position Sensor: If the sensor tests faulty or shows intermittent behavior, replace it. These are usually held in place by a retaining clip or a few bolts.
- Clear the code: After replacement, use an OBD-II scanner to clear the P0808 code and test drive the vehicle to ensure the issue is resolved.
👨🔧 When to Call a Professional
If diagnostic steps confirm power and ground at the sensor are correct, and the issue persists after replacing the Clutch Position Sensor, it's time to consult a professional. There could be a more complex wiring harness issue or even a PCM malfunction.
Commonly Asked Questions
What does a 'Clutch Position Sensor Circuit High Malfunction' mean for my car?
It means the car's computer is getting an electrical signal from the clutch position sensor that is too high, preventing it from accurately knowing when your clutch pedal is pressed or released. This can affect starting and cruise control.
Can I still drive with a P0808 code?
Driving may be possible if the vehicle starts, but it's not recommended as starting issues or cruise control malfunctions can be inconvenient or even unsafe. Address the issue promptly to prevent further problems.
Is replacing the Clutch Position Sensor a difficult DIY job?
Generally, replacing the clutch position sensor is an easy task. It's usually located near the clutch pedal and involves simple tools. Always refer to your vehicle's specific repair manual for exact steps.
What's the difference between a 'high' and 'low' circuit malfunction for this sensor?
A 'high' circuit malfunction (P0808) typically indicates an open circuit, a short to power, or a sensor sending a higher-than-expected voltage. A 'low' circuit malfunction (P0807) usually points to a short to ground or an open circuit, where the sensor sends a lower-than-expected voltage.
Will clearing the code fix the problem?
Clearing the code with an OBD-II scanner will turn off the Check Engine Light, but it will not fix the underlying mechanical or electrical issue. The code will likely return until the faulty sensor or wiring is repaired or replaced.