When the rotational speed of the transmission input shaft reaches a certain point, the ECU knows it’s time to command a gear change. If the signal from the input/turbine speed sensor / turbine speed sensor / TSS sensor isn’t consistent, a P2768 DTC will be set.
How Serious is the Code?
A P2768 diagnostic trouble code can lead to a number of transmission problems including unusually hard shifts and engine stalling.
Symptoms of a P2768 include:
- Unusually hard or erratic shifting
- Transmission will not change gears
- Increased fuel consumption
- Speedometer/odometer will not work or the needle fluctuates
- Engine stalls while stopped in gear
- Limp Mode
- Broken transmission input shaft speed sensor
- Damaged wiring or connector
- Metallic debris collected on the magnetic sensor
- ECU/TCM programming issue
How to Diagnose the Code?
To properly diagnose a P2768 OBDII trouble code, the transmission fluid needs to be checked, as dirt and metallic debris can collect on the sensor head and cause it not to work right. The wiring and connectors should be checked too. But if everything looks good, the transmission turbine speed sensor / TSS sensor will need to be checked directly.
What Repairs Will Fix P2768?
- Replace or repair transmission turbine speed sensor
- Replace or repair faulty wiring
- Replace or repair faulty connectors
- Reprogram ECU/TCM
- P0715 – Input/Turbine Speed Sensor Circuit Malfunction
- P0716 – Input/Turbine Speed Sensor Circuit Range/Performance
- P0717 – Input/Turbine Speed Sensor Circuit No Signal
- P0720 – Output Speed Sensor Circuit Malfunction
- P0721 – Output Speed Sensor Range/Performance
- P0722 – Output Speed Sensor No Signal
- P0723 – Output Speed Sensor Intermittent
- P2765 – Input/Turbine Speed Sensor B Circuit
- P2766 – Input/Turbine Speed Sensor B Circuit Range/Performance
- P2767 – Input/Turbine Speed Sensor B Circuit No Signal