What causes a P0158 code?

P0158 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 P0158 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0158 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

P0158

Oxygen Sensor High Voltage Circuit (Bank 2 Sensor 2)

What it means

The Engine Control Module (ECM) has detected that the downstream oxygen sensor signal voltage is stuck high, typically above 1.5 volts, indicating a potential sensor failure or wiring fault.