Clutch Position Sensor Circuit Low
The P0807 code means the vehicle's onboard diagnostic system has detected: Clutch Position Sensor Circuit Low. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $40 - $300 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light illuminated
- Cruise control disabled
- Engine may not start with clutch pressed
- PCM reads clutch as always disengaged
Probable Causes (Ranked by Likelihood)
- Short to ground in clutch position sensor circuit Very High
- Faulty clutch position sensor with low output High
- Corroded or damaged connector at sensor Moderate
- PCM internal circuit fault on clutch input Low
Frequently Asked Questions
What causes a low input signal for the clutch sensor?
A low input typically means the signal wire is shorted to ground or the sensor itself is producing a voltage below the expected minimum threshold.
Can water intrusion cause P0807?
Yes, water entering the clutch pedal area can corrode the sensor connector and cause low voltage readings. This is common in vehicles with leaking windshield seals.
Will the car still drive with P0807?
The car will likely drive, but cruise control will be disabled and you may experience intermittent starting difficulties. Have it repaired soon.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Measure voltage at the clutch position sensor connector with the key on
-
Check for short to ground in the signal wire between the sensor and PCM
-
Inspect the sensor connector for corrosion or bent pins
-
Swap sensor if voltage at connector is correct but output remains low
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2010-2020 Ford Fiesta ST
- 2008-2018 Subaru Impreza
- 2012-2019 Mazda3
- 2009-2017 Mitsubishi Lancer
Related Codes
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