What does code P278C mean?

Q: What does code P278C mean?

Kick Down Switch Circuit Low. P278C indicates that the powertrain control module (PCM) has detected a low-voltage condition on the kick-down switch circuit, which is used to signal a forced downshift for passing or climbing. The PCM monitors the circuit and sets this code when the signal voltage stays below the expected threshold for longer than a calibrated time, indicating a short to ground or an open circuit.

DTC codes / P27xx · Transmission / P278C

P278CKick Down Switch Circuit Low

P278C indicates that the powertrain control module (PCM) has detected a low-voltage condition on the kick-down switch circuit, which is used to signal a forced downshift for passing or climbing. The PCM monitors the circuit and sets this code when the signal voltage stays below the expected threshold for longer than a calibrated time, indicating a short to ground or an open circuit.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.