How serious is the code?
In terms of severity, a P0909 diagnostic code is extremely serious, as it means the TCM cannot shift gears as programmed. This can lead to serious driving problems and/or an unusable vehicle.
Symptoms
Symptoms of a P0909 include:
- Hard, delayed, or irregular shifts
- Transmission stuck in a single gear
- Transmission will not shift into or out of a gear
- Transmission refuses to engage gears
- Clutch slipping
- Engine seems to misfire
Causes
- Faulty gear lever assembly
- Faulty clutch position sensor
- Faulty clutch actuator
- Shift and select actuator assembly
- Stroke sensors
- Misadjusted control linkages
- Damaged wiring and/or connectors
- Clutch or transmission failure
How to diagnose the code?
The diagnostic procedure for a P0909 OBDII fault code will be specific to your transmission type. But it will involve a series of electrical tests and mechanical tests to determine which transmission parts have failed.
What repairs will fix P0909?
- Replace the shift and select actuator assembly
- Replace the stroke sensors
- Replace the gear shift mechanism
- Replace the clutch position sensor
- Replace the clutch actuator
- Replace the clutch
- Repair or replace damaged wiring or connectors
- Adjust or repair control linkages
- Repair or replace the transmission
Related Codes
P0905 – Gate select position circuit range/performance
P0906 – Gate select position circuit low
P0907 – Gate select position circuit high
P0908 – Gate select position circuit intermittent
P0910 – Gate select actuator circuit/open