What causes a P0773 code?

P0773 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 P0773 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0773 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

P0773

Shift Solenoid E Electrical Failure

What it means

The Engine Control Module (ECM) or Transmission Control Module (TCM) has detected an electrical malfunction in the Shift Solenoid 'E' circuit, indicating a potential open, short, or internal solenoid failure.