What does code P279C mean?

Q: What does code P279C mean?

Transfer Case Gear Neutral Incorrect Ratio. P279C indicates that the transfer case control module has detected an incorrect ratio between the front and rear propeller shaft speeds when the transfer case is commanded into neutral. The module compares input and output speed sensor signals and flags this code when the calculated ratio falls outside the expected range for the neutral position.

DTC codes / P27xx · Transmission / P279C

P279CTransfer Case Gear Neutral Incorrect Ratio

P279C indicates that the transfer case control module has detected an incorrect ratio between the front and rear propeller shaft speeds when the transfer case is commanded into neutral. The module compares input and output speed sensor signals and flags this code when the calculated ratio falls outside the expected range for the neutral position.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.