What causes a P2429 code?

P2429 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 P2429 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2429 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

P2429

Exhaust Gas Temperature Too High Bank 1

What it means

The Engine Control Module (ECM) has detected that the exhaust gas temperature (EGT) sensor for bank 1 is reporting temperatures above the predetermined safety or operational threshold.