P0809

Clutch Position Sensor Circuit Intermittent

Severity: Medium
Driving: Drivable — book it in

The clutch position signal is dropping out intermittently. The car may drive normally for a while and then engage harshly or refuse to move, recovering later. Intermittent faults of this kind are nearly always connections or wiring rather than the sensor itself.

Possible causes

CommonLoose, corroded or backed-out connector pin
CommonChafed or fatigued wiring near the bellhousing
PossibleFailing sensor that drops out when hot
PossibleWater ingress into the connector
PossibleSticking actuator producing erratic movement

What you might notice

Occasional harsh engagement or judder
Transmission occasionally refusing to engage, then recovering
Fault linked to heat, bumps or wet weather
Check engine light coming and going

What to check, in order

Note when it happens. Hot points at the sensor, bumps point at wiring, wet points at the connector - that observation is worth more than any single measurement.
Wiggle-test the harness with the live data screen showing clutch position.
Inspect the connector for a pin that has backed out of its housing.
Run the clutch calibration procedure and see whether the fault returns.
Do not replace the sensor on an intermittent code alone - confirm the dropout at the sensor.

Read this code from your own car

Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.

Get Pin16 on Google Play

Where this code sits

B · Body C · Chassis P · Powertrain U · Network and communication