What causes a P0751 code?

P0751 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P0751 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0751 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P0751

Shift Solenoid A Performance or Stuck Off

What it means

The transmission control module (TCM) has detected a performance issue or a stuck condition in shift solenoid 1 (A), preventing proper gear selection or mechanical transition.