DTC codes / P28xx · Transmission / P283D
P283D means the transmission control module (TCM) has detected a low-voltage condition on the electrical circuit for shift fork C, which is the actuator that moves the sleeve to engage or disengage a gear in a dual-clutch or automated manual transmission. The TCM monitors the return signal from the fork position sensor or the command wire to the fork actuator, and it sets this code when the voltage on that circuit falls below the expected threshold for the current gear and fork position.
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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