What causes a SPN 2802 code?

SPN 2802 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 2802 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2802 active.

How do I fix SPN 2802?

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 2802

Transmission Gear Range Selector Message Fault

What it means

The engine control module (ECM) is reporting a loss of communication or invalid data from the transmission gear range selector via the J1939 data link.