The torque converter clutch is responsible for locking the engine and transmission into 1:1 direct drive (or partial lockup) for better fuel economy and performance. If the voltage signal coming from the TSS sensor is low, a P2769 DTC will be triggered.
How Serious is the Code?
A P2769 diagnostic trouble code is quite serious, because it means the ECU can’t control the torque converter. If this happens, a number of drivability issues can occur, including delayed shifts and engine stalling when you slow down/stop.
Symptoms of a P2769 include:
- Delayed, harsh or erratic shifts
- Engine stalling
- Transmission shudders/shakes when coming to a stop or accelerating
- Getting ‘stuck’ in a gear
- Vehicle won’t move when in gear
- Decreased fuel economy
- Transmission overheats
- Low transmission fluid level
- Dirty transmission fluid / filter
- Damaged wiring/connector
- Faulty torque convertor clutch solenoid / TCC solenoid
- Faulty torque convertor and/or clutch assembly
- Internal pressure issue
- Valve body issue
- TCM failure
How to Diagnose the Code?
To figure out what’s causing a P2769 OBDII trouble code, a technician should start by checking the level and condition of the transmission fluid. Next, they should check the wiring and connectors for damage, along with the manufacturer’s TSB database. After that, the transmission torque converter clutch solenoid should be checked directly.
What Repairs Will Fix P2769?
- Replace the torque converter clutch solenoid
- Replace the torque converter or clutch
- Change transmission fluid and filter
- Repair/replace damaged wiring and connectors
- Repair/replace TCM or ECU
- Install a rebuilt or remanufactured transmission
- P0741 – Torque Converter Clutch Circuit Performance or Stuck Off
- P0742 – Torque Converter Clutch Circuit Stuck On
- P0743 – Torque Converter Clutch Circuit Electrical
- P0744 – Torque Converter Clutch Circuit Intermittent
- P2769 – Torque Converter Clutch Circuit Low
- P2770 – Torque Converter Clutch Circuit High