What causes a P1030 code?

P1030 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 P1030 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1030 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

P1030

EGR temperature out of range at powerup

What it means

The ECM detects that the Exhaust Gas Recirculation (EGR) temperature sensor signal is outside of the expected voltage range immediately upon key-on powerup.