What does code P278E mean?

Q: What does code P278E mean?

Kick Down Switch Circuit Intermittent/Erratic. P278E indicates that the powertrain control module (PCM) has detected an intermittent or erratic signal from the kick down switch circuit, which is used to trigger a downshift when the accelerator is pressed fully. The PCM monitors the switch's electrical circuit and sets this code when the signal momentarily drops out or behaves unpredictably, rather than being continuously open or shorted.

DTC codes / P27xx · Transmission / P278E

P278EKick Down Switch Circuit Intermittent/Erratic

P278E indicates that the powertrain control module (PCM) has detected an intermittent or erratic signal from the kick down switch circuit, which is used to trigger a downshift when the accelerator is pressed fully. The PCM monitors the switch's electrical circuit and sets this code when the signal momentarily drops out or behaves unpredictably, rather than being continuously open or shorted.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.