What causes a SPN 792 code?

SPN 792 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 SPN 792 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 792 active.

How do I fix SPN 792?

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

J1939 SPN

SPN 792

J1939 SPN 792 — Engine Management parameter

What it means

Wheel Speed Sensor 2nd Axle Left. This code specifically points to a data error or signal fault from the left wheel speed sensor on the second (drive) axle reported via the J1939 network.