What Does P0807 Mean?
The Clutch Position Sensor circuit is reading abnormally low voltage. The PCM expects the CPS signal to be within a specific voltage range, and the detected voltage has fallen below the minimum threshold. This typically indicates a short to ground in the signal circuit, a failed sensor with low output, or a wiring issue pulling the signal voltage down.
Common Causes
30%
Short to ground in the CPS signal wire
30%
Failed clutch position sensor with shorted internal resistance
20%
Damaged or water-intruded connector at the sensor
12%
Chafed wiring contacting a ground point (body, bracket)
8%
PCM input pull-down resistor fault
Diagnostic Steps
1
Disconnect the CPS connector and check if the scan tool signal voltage rises to reference voltage (approximately 5V) — if it does, the sensor is shorted internally.
2
With the sensor disconnected, measure resistance between the signal pin on the sensor and ground — low resistance confirms an internal short.
3
Inspect the CPS wiring harness for chafing against metal brackets, the firewall, or pedal assembly that could create a short to ground.
4
Check the connector for water intrusion, corrosion, or bent pins that could bridge signal to ground.
5
Measure voltage at the PCM connector on the CPS signal pin with sensor disconnected to verify the PCM side of the circuit is intact.
Estimated Repair Cost
$40 - $350
Parts + labor, varies by vehicle and location
The Clutch Position Sensor circuit is reading abnormally low voltage. The PCM expects the CPS signal to be within a specific voltage range, and the detected voltage has fallen below the minimum threshold. This typically indicates a short to ground in the signal circuit, a failed sensor with low outp...
The most common cause of P0807 (Clutch Position Sensor Circuit Low Malfunction) is: Short to ground in the CPS signal wire
Typical repair costs for P0807 range from $40 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drivable, but the PCM will interpret the clutch as always depressed or in an unknown state. Cruise control and starter interlock functions may be compromised. Repair within a reasonable timeframe.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0807 to identify the root cause.
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Quick Info
Category
Powertrain
System
Clutch / Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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