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What is your question?
p1744 says its the torque converter clutch solenoid. I am wondering where that is located and is it an expensive fix? It is a mazda 626, automatic tranny, 1998. The car starts shifting hard after the car has warmed up. 45-60min
2 Replies
If the code resets without driving the vehicle, check the resistance of the TCC solenoid, it should be 12.5 - 19.0 ohms. If the solenoid resistance is way out of range, the solenoid may be bad. If the code only sets back after driving, monitor the TCC solenoid command and the engine RPM to see if the torque converter actually locks up when the PCM commands it to. If the torque converter is not locking up, the problem will be internal to the transmission. This can be treated the same as a code P0741. This code can either indicate a fault with the TCC solenoid circuit electrically or it can indicate that the solenoid didn't function mechanically. If the code resets without having to drive the vehicle, the problem is electrical. If the code only resets after the vehicle has been driven, the problem is mechanical. It is very rare for this code to be the result of an electrical circuit fault. This transmission has a high failure rate and in most cases the transmission is the cause of the code P1744.