What does code P27E9 mean?

Q: What does code P27E9 mean?

Transmission Range Control B Circuit Low. P27E9 indicates that the transmission control module (TCM) has detected a low voltage condition on the electrical circuit for 'Range Control B', which is the signal path that commands the transmission into a specific gear range or mode. The TCM monitors the circuit and sets this code when the voltage on the control wire falls below the expected threshold, indicating a short to ground, an open circuit, or a faulty component.

DTC codes / P27xx · Transmission / P27E9

P27E9Transmission Range Control B Circuit Low

P27E9 indicates that the transmission control module (TCM) has detected a low voltage condition on the electrical circuit for 'Range Control B', which is the signal path that commands the transmission into a specific gear range or mode. The TCM monitors the circuit and sets this code when the voltage on the control wire falls below the expected threshold, indicating a short to ground, an open circuit, or a faulty component.

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.