What causes a P2246 code?

P2246 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 P2246 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2246 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

P2246

O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1

What it means

The Engine Control Module (ECM) has detected a voltage level in the oxygen sensor reference circuit that is higher than the calibrated threshold. This circuit is critical for the sensor to accurately monitor exhaust gas composition.