P0743

2017-10-10

Description:

  • The fault code P0743 indicates that there is an electrical issue in the circuit that controls the torque converter clutch. This may result in various symptoms and drivability issues.

Possible Symptoms:

  • Illuminated check engine light

  • Transmission slipping or shuddering

  • Harsh shifting or delayed shifting

  • Decreased fuel efficiency

  • Reduced engine power or acceleration

Possible Causes:

  • Faulty torque converter clutch solenoid

  • Damaged or corroded wiring in the circuit

  • Failed engine control module (ECM)

  • Malfunctioning transmission control module (TCM)

Related Parts:

  • Torque Converter Clutch: The torque converter allows shifting gears in an automatic transmission. It is the equivalent of a clutch in manual transmission system. The torque converter clutch creates a connection between the engine output and the transmission input. Problem leads to decreased fuel economy

Possible Solutions:

  • Replace the torque converter clutch solenoid

  • Check and repair any damaged or corroded wiring in the circuit

  • Replace the engine control module (ECM) if necessary

  • Replace the transmission control module (TCM) if necessary

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