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DTC codes / P27xx · Transmission / P27DC
P27DC indicates that the transmission control module (TCM) has detected an intermittent fault in the electrical circuit for pressure control solenoid T, which is one of the solenoids that regulates hydraulic pressure inside the automatic transmission. The TCM monitors the solenoid's current draw and response time, and it sets this code when the signal is erratic or momentarily lost rather than completely open or shorted.
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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