DTC codes / P27xx · Transmission / P2758
P2758 indicates that the transmission control module (TCM) has detected a fault in the torque converter clutch (TCC) pressure control solenoid circuit, specifically that the circuit is stuck in the energized or 'on' state when it should be off. The TCM monitors the solenoid's electrical current and expected response, and it sets this code when the circuit remains continuously grounded or the solenoid fails to release, preventing normal torque converter clutch operation.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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