What causes a P2208 code?

P2208 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 P2208 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2208 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

P2208

NOx Sensor Heater Control Circuit Performance Bank 1

What it means

The Engine Control Module (ECM) monitors the heater circuit of the inlet NOx sensor to ensure it reaches operating temperature; this code triggers when the heater does not reach the required resistance or temperature within a specified timeframe.