What does code P2711 mean?

Q: What does code P2711 mean?

Unexpected Mechanical Gear Disengagement. P2711 indicates that the transmission control module (TCM) has detected an unexpected mechanical disengagement of a gear while the vehicle was in motion, meaning the commanded gear did not match the actual gear ratio for a brief period. The TCM monitors input and output shaft speeds to calculate the actual gear ratio and flags this code when the ratio falls outside the expected range without a corresponding shift command.

DTC codes / P27xx · Transmission / P2711

P2711Unexpected Mechanical Gear Disengagement

P2711 indicates that the transmission control module (TCM) has detected an unexpected mechanical disengagement of a gear while the vehicle was in motion, meaning the commanded gear did not match the actual gear ratio for a brief period. The TCM monitors input and output shaft speeds to calculate the actual gear ratio and flags this code when the ratio falls outside the expected range without a corresponding shift command.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.