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From the OBDII Code book: P0741 - Powertrain: Torque Converter Clutch Circuit Performance/Stuck Off
(torque converter clutch circuit performance or stuck on)
Trouble code P0741 means:Torque converter clutch circuit performance or stuck on
Trouble code P0741 means:Torque converter clutch circuit performance or stuck on
Trouble code P0741 means:Torque converter clutch circuit performance or stuck on
Trouble code P0741 means:Torque converter clutch circuit performance or stuck off
Trouble code P0741 means:Torque converter clutch circuit performance or stuck off
Trouble code P0741 means:Torque converter clutch circuit performance or stuck on
Trouble code P0732 means: Incorrect gear ratio, second gear Trouble code P0741 means: Torque converter clutch, circuit performance problem or stuck in off position Trouble code P0743 means: Torque converter clutch circuit, electrical problem Trouble code P0745 means: Pressure control solenoid malfunction
P0741 = Torque converter Circuit Performance or stuck off. P0746 = Pressure Control Solenoid Circuit Performance or stuck off.
Trouble code P0741 means:Torque converter clutch,circuit performance problem or stuck in off position
This code relates to the torque convertor clutch control system, similar to the P1870 code found in other GM models. The usual problem here is slipping in the torque convertor's viscous clutch and possibly a solenoid problem. The most common repair would be to remove the transmission and replace the electronic pressure control solenoid (EPC), the torque convertor clutch solenoid (TCC), and replace the torque convertor to an aftermarket upgraded unit the eliminates the viscous clutch (available from several suppliers that install the upgraded "Sonnax" brand convertor parts). This would also be the time to replace the internal filter inside the side cover (only accessible when the transmission is removed from the car) and both scavenger filters in the lower pan. It is usually not necessary to dismantle the transmission past removing the side cover. Re-install the transmission, re-scan and clear codes. NOTE: This installation is not for a novice mechanic, the Cadillac is a very labour intensive "remove & replace" on the transmission and requires special tools and training.