What causes a P229E1C code?

P229E1C 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 P229E1C code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P229E1C active.

How do I fix P229E1C?

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

Log in Sign up

OBD-II

P229E1C

NOx sensor - row 1 sensor 2

What it means

Output from the voltage range in the circuit

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free