What causes a SPN 735 code?

SPN 735 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 735 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 735 active.

How do I fix SPN 735?

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 735

J1939 SPN 735 — Engine Management parameter

What it means

SPN 735 indicates a Parameter Memory configuration error within the Engine Management system. Essentially, the ECM has been programmed with settings that are incompatible or out of the allowed range.