What causes a P2081 code?

P2081 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 P2081 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2081 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

P2081

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 1

What it means

The Engine Control Module (ECM) has detected an intermittent voltage signal from the Exhaust Gas Temperature (EGT) sensor located before the diesel oxidation catalyst. This indicates a potential loose connection or internal sensor failure affecting thermal management.