P0805
Clutch Position Sensor A Circuit
Transmission — clutch position sensing
Generic OBD-II
Medium
What it means
P0805 means the control module has detected a circuit problem with the "A" clutch position sensor. On automated-manual and some clutch-equipped transmissions, this sensor tells the module exactly where the clutch is, so a fault can make engagement rough and shifting imprecise, sometimes forcing a limp mode. It's a sensor-circuit fault affecting the transmission, not the engine's ability to start.
Medium
Can I keep driving? Often driveable, but on automated-manual gearboxes clutch engagement and shifting may be rough or limp — have it checked; it usually won't affect starting.
Common symptoms
What you'll notice
- Rough or imprecise clutch engagement
- Hard, delayed, or missed shifts
- Transmission slipping or dropping into limp mode
- Engine revs without matching movement on take-off
- Check-engine light on
Common causes
Most likely first
- Failed clutch position sensorLikely
- Damaged wiring or corroded connector in the sensor circuitCommon
- Misadjusted or misaligned sensorCommon
- Loose or corroded electrical connectionsLess often
- Failed transmission control module (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and view the clutch position value in live data.
- Inspect the sensor wiring and connector for damage or corrosion.
- Check the sensor's mounting and adjustment against the clutch actuator's range.
- Test the sensor's signal through its travel; replace if it reads open, shorted, or stuck.
- Clear the code and road-test to confirm smooth engagement returns.
FAQ
Quick answers
Is it safe to drive with P0805?+
Short trips are usually fine, but on automated-manual transmissions the clutch may engage roughly or the gearbox may limp. Have it diagnosed before it worsens.
Can I just clear P0805?+
It returns once the sensor or wiring fault reappears. Diagnose the circuit rather than only clearing the code.
Related codes
Often seen with P0805
Read & clear P0805 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX