What does code P0733 mean?

Q: What does code P0733 mean?

Gear 3 Incorrect Ratio. P0733 means the transmission control module (TCM) commanded third gear but the measured ratio between the input and output speed sensors did not match the programmed third-gear ratio. The computer detected a mismatch beyond its calibrated tolerance, which points to a slipping or incorrectly engaged third gear rather than an electrical fault in the sensor circuit itself.

DTC codes / P07xx · Transmission / P0733

P0733Gear 3 Incorrect Ratio

P0733 means the transmission control module (TCM) commanded third gear but the measured ratio between the input and output speed sensors did not match the programmed third-gear ratio. The computer detected a mismatch beyond its calibrated tolerance, which points to a slipping or incorrectly engaged third gear rather than an electrical fault in the sensor circuit itself.

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.