How to Diagnose and Fix P0742 Engine Code - OBD II Trouble Code Explain

The OBD-II fault code P0742 means that the Torque Converter Clutch Circuit is stuck on. This means that the Powertrain Computer is seeing less than a 200 RPM difference between the rotational speed of the Torque Converter and the Transmission Input Shaft when the vehicle is slowing down below 30 mph or when the brake pedal is applied.
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