Clutch Position Sensor Circuit Low Voltage
The P0807 code indicates that the Powertrain Control Module (PCM) has detected a low voltage signal from the clutch position sensor circuit. This sensor monitors the position of the clutch pedal and is critical for systems like cruise control, start/stop, and transmission shift logic. A low voltage condition can be caused by a faulty sensor, wiring issues, or a short to ground.
01. Most Common Causes
- Faulty clutch position sensor
- Short to ground in sensor circuit
- Open or damaged wiring/connectors
- Corroded or loose electrical connections
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Cruise control inoperative
- Engine start/stop system malfunction
- Transmission shifting issues (automatic)
- No start condition (if safety interlock)
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect clutch position sensor and wiring for damage or corrosion.
Step 3: Test sensor voltage reference and ground at the connector (should be ~5V reference, good ground).
Step 4: Measure sensor signal voltage while pressing clutch pedal (should vary smoothly).
Step 5: If signal is low or stuck, disconnect sensor and check for short to ground in harness.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It may be safe for short trips, but you may lose cruise control and start/stop functionality. If the sensor is part of a safety interlock, the vehicle may not start. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for sensor replacement plus diagnostic time. Wiring repairs may add to cost.