What causes a P2219 code?

P2219 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 P2219 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2219 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

P2219

NOx Sensor Heater Control Circuit Low Bank 1 Sensor 2

What it means

The Engine Control Module detects a low voltage condition in the heating circuit of the outlet NOx sensor, preventing the sensor from reaching operating temperature.