The GSP sensor/gate select position sensor sends an electrical signal to the ECU and TCM to let it know what gear has been selected with the shifter. If this sensor is not performing within the pre-programmed parameters, a P0905 DTC will be saved.
How Serious is the Code?
Unless the engine and transmission computers know what gear has been selected, you may experience a number of transmission problems and engine problems like harsh gear changes and a no-start condition of the engine. So a P0905 diagnostic trouble code is actually pretty serious.
Symptoms of a P0905 include:
- Engine does not start
- Transmission behaves erratically
- Harsh gear changes
- Transmission delays before shifting gears
- Cruise control stops working correctly
- Gate select position sensor has become misaligned
- Shift linkage adjustment issue
- Failing GSP sensor
How to Diagnose the Code?
Problems with the gate select position sensor often occur after transmission repairs have been performed. So the first step to diagnosing a P0905 OBDII trouble code, is to check the adjustment of the GSP sensor. The shift linkage alignment may need to be checked as well.
What Repairs Will Fix P0905?
- Adjust gate selection position sensor
- Adjust shift linkage
- Replace GSP sensor
- P0904 – Gate Select Position Circuit
- P0906 – Gate Select Position Circuit Low
- P0907 – Gate Select Position Circuit High
- P0908 – Gate Select Position Circuit Intermittent