What causes a P0749 code?

P0749 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 P0749 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0749 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

P0749

Pressure Control Solenoid Electrical Intermittent Fault

What it means

The Engine Control Module or Transmission Control Module has detected an intermittent electrical signal fault in the pressure control solenoid 'A' circuit.