What causes a P0242 code?

P0242 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 P0242 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0242 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

P0242

Turbocharger Boost Sensor B Circuit High

What it means

The engine control module (ECM) detects a voltage signal from the Turbocharger Boost Sensor 'B' that is higher than the expected operating range.