What causes a P0595 code?

P0595 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 P0595 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0595 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

P0595

Cruise Control Servo Control Circuit Low Voltage

What it means

The Engine Control Module (ECM) has detected voltage below the calibrated range on the cruise control servo control circuit, indicating a potential short to ground or open circuit.