What causes a P0775 code?

P0775 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 P0775 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0775 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

P0775

Pressure Control Solenoid B Malfunction

What it means

The Engine Control Module (ECM) or Transmission Control Module (TCM) has detected an electrical or mechanical fault in the solenoid responsible for regulating hydraulic pressure in the transmission.