The gate select position sensor/GSP sensor is responsible for telling the ECU and TCM what gear the driver has selected. If there is an issue with this important transmission sensor, a P0904 DTC will be triggered.
Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.
What Transmission Do I Have?
How Serious is the Code?
When a P0904 diagnostic trouble code is present, a number of serious drivability issues can occur, including erratic transmission behavior and engine stalling.
Symptoms
Symptoms of a P0904 include:
- Engine will not start
- Erratic shifting
- Harsh or delayed shifts
- Transmission seems to skip gears
- Cruise control stops working correctly
Causes
- Misaligned gate select position sensor
- Shift linkage mis-adjustment
- Failed gate select position sensor
How to Diagnose the Code?
The first step to diagnosing a P0904 OBDII trouble code, is to check to the alignment of the gate select position sensor. The shift linkage itself may also need to be examined.
Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.
What Transmission Do I Have?
What Repairs Will Fix P0904?
- Adjust gate selection position sensor
- Adjust shift linkage
- Replace GSP sensor
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
