What does code P1734 mean?

Q: What does code P1734 mean?

Gear Control Malfunction. P1734 on a Jaguar indicates the transmission control module (TCM) has detected a malfunction in the gear control system, meaning the electrical or hydraulic commands that shift the transmission are not producing the expected mechanical response. The TCM monitors gear engagement and compares it to the commanded gear, and when the discrepancy exceeds calibrated limits, it stores this code and typically illuminates the warning light.

DTC codes / Jaguar codes / P1734

P1734 · JaguarGear Control Malfunction

P1734 on a Jaguar indicates the transmission control module (TCM) has detected a malfunction in the gear control system, meaning the electrical or hydraulic commands that shift the transmission are not producing the expected mechanical response. The TCM monitors gear engagement and compares it to the commanded gear, and when the discrepancy exceeds calibrated limits, it stores this code and typically illuminates the warning light.

SystemPowertrain

Code typeJaguar specific

SeverityHigh

Fix difficultyProfessional

AreaTransmission

Guidance is general and written for Jaguar vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.