P0805 Clutch Position Sensor Circuit

P0805 points to the clutch position sensor circuit. The controller detected a fault in the signal used to determine clutch pedal or clutch actuator position.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace clutch hardware before checking the clutch position sensor signal and adjustment.

Symptoms of P0805

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0805

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Compare clutch position data with pedal movement or actuator command using scan-tool data if available.
Inspect sensor wiring, connector condition, adjustment, pedal or actuator linkage, reference voltage, and ground.
Review start-interlock, cruise cancel, rev-hang, shift, or automated-manual symptoms that depend on clutch position.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.