What does code P074C mean?

Q: What does code P074C mean?

Unable to Engage Gear 4. P074C is a generic transmission code indicating that the transmission control module (TCM) commanded fourth gear but did not see the expected gear ratio or engagement confirmation. The TCM monitors input and output speed sensors and detects a mismatch when fourth gear is requested, often due to hydraulic or mechanical faults inside the transmission.

DTC codes / P07xx · Transmission / P074C

P074CUnable to Engage Gear 4

P074C is a generic transmission code indicating that the transmission control module (TCM) commanded fourth gear but did not see the expected gear ratio or engagement confirmation. The TCM monitors input and output speed sensors and detects a mismatch when fourth gear is requested, often due to hydraulic or mechanical faults inside the transmission.

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.