DTC codes / P27xx · Transmission / P2720
P2720 indicates that the transmission control module (TCM) has detected an abnormally low voltage or current on the control circuit for pressure control solenoid 'D', which is responsible for regulating hydraulic pressure inside the automatic transmission. The TCM monitors the circuit and sets this code when the signal falls below the expected range, which can affect shift quality and transmission 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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