What causes a P2085 code?

P2085 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 P2085 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2085 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

P2085

Exhaust Gas Temperature Sensor Intermittent Circuit Bank 1 Sensor 2

What it means

The engine control module (ECM) detects an erratic or intermittent electrical signal from the exhaust gas temperature (EGT) sensor located downsteam of the Diesel Oxidation Catalyst (DOC).