What causes a P2738 code?

P2738 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 P2738 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2738 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

P2738

Pressure Control Solenoid E Short to Power

What it means

This code indicates a short to a voltage source in the electrical circuit of pressure control solenoid 'E'. This can keep the solenoid continuously actuated or prevent it from operating correctly.