What causes a P0785 code?

P0785 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 P0785 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0785 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

P0785

P0785 Shift/Timing Solenoid Malfunction

What it means

An electrical fault detected in the transmission shift timing solenoid or its control circuit, indicating a mismatch between commanded and actual solenoid state.