If the transmission control module/engine control unit detects that the rate of torque converter clutch slip is not appropriate for the vehicle speed, it will store a 1814 diagnostic trouble code.
How Serious is the Code?
If the torque converter clutch is not working properly, the torque converter itself could overheat and destroy the clutch material and bearings. This can also cause the engine to stall unexpectedly.
Symptoms of a P1814 include:
- Transmission overheats
- Engine stalling
- Failed torque control solenoid
- Damage to the torque control solenoid harness
- Torque converter clutch issues
How to Diagnose the Code?
The torque control solenoid / TCC solenoid wiring harness will need to be checked for signs of damage. If none is found, the solenoid itself will need to be tested. If there are no torque solenoid problems, then the torque converter clutch assembly may be to blame.
What Repairs Will Fix P1814?
Replace the torque control solenoid
Repair the torque control solenoid wiring
Repair or replace the torque converter clutch assembly
P0741 – Torque Converter Clutch Circuit Performance or Stuck Off
P0742 – Torque Converter Clutch Circuit Stock On
P0743 – Torque Converter Clutch Circuit Electrical
P0744 – Torque Converter Clutch Circuit Intermittent