What causes a P2215 code?

P2215 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 P2215 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2215 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

P2215

NOx Sensor Circuit Low (Bank 1 Sensor 2)

What it means

The engine control module detects a low voltage signal from the downstream NOx sensor located after the SCR catalyst, indicating a sensor or wiring failure.