What causes a SPN 750 code?

SPN 750 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 750 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 750 active.

How do I fix SPN 750?

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 750

J1939 SPN 750 — Engine Management parameter

What it means

SPN 750 relates to the Exhaust Brake Solenoid circuit. It indicates that the ECM has detected a voltage out of range (open or short) in the circuit that controls the engine exhaust brake.