What causes a P2205 code?

P2205 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 P2205 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2205 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

P2205

NOx Sensor Heater Control Circuit Open Bank 1 Sensor 1

What it means

The Engine Control Module (ECM) has detected an open circuit in the heater control path for the inlet NOx sensor. The sensor heater is required to reach operating temperature and prevent moisture damage.