What causes a SPN 286 code?

SPN 286 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 286 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 286 active.

How do I fix SPN 286?

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 286

J1939 SPN 286 — Fuel/Air parameter

What it means

SPN 286 is a generic SAE fault indicating an 'Abnormal Update Rate' or 'Invalid Data' received over the J1939 network regarding fuel or air management parameters. It essentially means the ECM is not receiving the expected data stream from a component on the CAN bus.