Clutch Position Sensor Circuit Range/Performance
The P0806 code indicates the clutch position sensor circuit is outside its normal operating range or not performing as expected. This sensor tells the transmission control module when the clutch is engaged or disengaged, and a fault prevents proper transmission operation and clutch control.
What You Might Notice
- Engine will not start or has difficulty starting
- Motor starts without requiring clutch pedal depression
- Transmission warning lamp illuminated
- Check engine light illuminated
- Transmission may not shift properly or stay in limp mode
Most Common Causes
- 1
Defective clutch position sensor
The sensor itself has failed and is sending incorrect or no signal to the transmission control module. This is the most common cause of this code.
- 2
Faulty or damaged wiring
Wiring between the sensor and TCM may be broken, pinched, or damaged, preventing proper signal transmission.
- 3
Corroded or loose connector
The connector at the sensor or control module may be corroded, loose, or improperly seated, causing intermittent or no signal.
- 4
Defective PCM/TCM or ground strap
A loose or corroded control module ground strap, faulty fuse/fusible link, or failing transmission control module can prevent proper sensor signal reception.
How to Diagnose It
- 1
Check Defective clutch position sensor — The sensor itself has failed and is sending incorrect or no signal to the transmission control module. This is the most common cause of this code.
- 2
Check Faulty or damaged wiring — Wiring between the sensor and TCM may be broken, pinched, or damaged, preventing proper signal transmission.
- 3
Check Corroded or loose connector — The connector at the sensor or control module may be corroded, loose, or improperly seated, causing intermittent or no signal.
- 4
Check Defective PCM/TCM or ground strap — A loose or corroded control module ground strap, faulty fuse/fusible link, or failing transmission control module can prevent proper sensor signal reception.
How to Fix It
- 1
Replace clutch position sensor
Locate the clutch position sensor (typically mounted near the clutch pedal or on the transmission), disconnect the wiring harness, remove the fasteners, and install a new sensor. Reconnect wiring and clear the code.
- 2
Inspect and repair wiring
Trace the wiring harness from the sensor to the transmission control module for breaks, pinches, or corrosion. Repair or replace damaged sections and reconnect securely.
- 3
Clean and reseat connectors
Disconnect the sensor and TCM connectors, clean any corrosion with electrical contact cleaner, and firmly reseat both connectors. Verify proper seating and test for code return.
- 4
Check ground strap and fuses
Inspect the TCM/PCM ground strap for corrosion or looseness and tighten if needed. Check the relevant fuse or fusible link for the clutch circuit and replace if blown. If code persists, have TCM/PCM tested by a professional.
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