What causes a P2212 code?

P2212 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 P2212 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2212 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

P2212

NOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 2

What it means

The Engine Control Module (ECM) has detected an irrational signal or performance issue with the internal heating element of the outlet nitrogen oxide (NOx) sensor. This sensor must reach specific operating temperatures to provide accurate emissions data.