The 2023 Buick Encore triggering P0741 indicates the torque converter clutch (TCC) is stuck in the off/disengaged position. This subcompact SUV's automatic transmission uses the TCC for fuel efficiency, and failure to lock affects economy.
Understanding P0741
P0741 sets when the TCM commands TCC engagement but doesn't detect the expected lockup. The TCC should engage during steady-speed cruising to eliminate torque converter slip and improve fuel economy.
TCC Function
The torque converter uses fluid coupling to transfer power from engine to transmission. The TCC mechanically locks the converter during cruising, creating a direct drive connection. This reduces slip losses and improves efficiency.
Stuck Off Symptoms
Reduced fuel economy during highway driving. Higher engine RPM than expected at cruise speeds. Transmission may run hotter due to fluid churning. No noticeable lockup feel during steady driving.
Common Causes
TCC solenoid failure (electrical or mechanical). Contaminated transmission fluid affecting solenoid. Wiring issues in TCC circuit. Internal transmission damage preventing lockup. TCM signal problems.
Fluid Importance
Transmission fluid condition significantly affects TCC operation. Contaminated fluid can stick solenoids. Low fluid affects hydraulic pressure for lockup. Check level and condition early in diagnosis.
Repair Costs
Transmission fluid service costs $150-300. TCC solenoid replacement runs $300-700 (requires pan removal or valve body access). Torque converter replacement if damaged ranges $800-1,500.