The code indicates a problem with the torque converter lock-up clutch rather than an issue with its hydrokinetic function. The lock-up clutch is controlled by the EDS 4 solenoid in the valve body assembly. The lower front valve block contains two valves which control the operation of the lock-up clutch. The valve body assembly can be removed with the transmission still in the vehicle, and it could then be tested on a Axiline or HydraTest machine.







The torque converter can only be replaced by removing the transmission – a much bigger job. If you have access to diagnostics kit that can monitor and record the engine and turbine speeds in real time you can pinpoint the issue very accurately without risking spending money on something that turns out not to be faulty.



Phil