P0742 Code - Torque Converter Clutch Circuit Stuck On

What does P0742 Mean?

OBD-II Code P0742 is defined as a Torque Converter Clutch Circuit Stuck On

When the code P0742 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM 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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What are the common causes of P0742 ?

• Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
• Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
• Defective ECU strategies or components will prevent proper regeneration

How do you troubleshoot P0742 ?

While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the P0742 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.

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