What causes a P0472 code?

P0472 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 P0472 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0472 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

P0472

P0472 - Exhaust Back Pressure Sensor Circuit Low

What it means

Indicates the engine control module (ECM) has detected a voltage signal from the exhaust back pressure sensor that is below the minimum calibrated threshold. This sensor is critical for EGR flow calculation and VGT turbocharger vane positioning.