How serious is the code?
Unless the engine and transmission computers know which gear has been selected, you may experience a number of transmission and engine issues such as difficult gear changes and a no-start condition. Therefore, a P0905 diagnostic code is quite serious.
Symptoms
Symptoms of a P0905 include:
- Engine does not start
- Transmission behaves erratically
- Difficult gear shifts
- Transmission delays before shifting
- Cruise control no longer works properly
Causes
- Gate select position sensor is misaligned
- Shift linkage adjustment issue
- Faulty GSP sensor
How to diagnose the code?
Problems with the gate select position sensor often occur after transmission repairs have been performed. Therefore, the first step in diagnosing an OBDII P0905 fault code is to check the GSP sensor adjustment. It may also be necessary to check the shift linkage alignment.
What repairs will fix P0905?
- Adjust the gate select position sensor
- Adjust the shift linkage
- Replace the GSP sensor