What does code P27E7 mean?

Q: What does code P27E7 mean?

Transmission Range Control B Circuit/Open. P27E7 indicates that the transmission control module (TCM) has detected an open circuit or abnormal voltage on the 'B' range control circuit, which is part of the transmission range selection system. This circuit is responsible for confirming the selected gear range, and an open circuit prevents the TCM from verifying the range, potentially leading to incorrect shift decisions or a default limp mode.

DTC codes / P27xx · Transmission / P27E7

P27E7Transmission Range Control B Circuit/Open

P27E7 indicates that the transmission control module (TCM) has detected an open circuit or abnormal voltage on the 'B' range control circuit, which is part of the transmission range selection system. This circuit is responsible for confirming the selected gear range, and an open circuit prevents the TCM from verifying the range, potentially leading to incorrect shift decisions or a default limp mode.

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.