What causes a SPN 36 code?

SPN 36 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 36 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 36 active.

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 36

J1939 SPN 36 — Engine parameter

What it means

SPN 36 is the standard J1939 identifier for the Clutch Switch signal. This indicates the Engine Control Module (ECM) is receiving an irrational signal from the clutch pedal position switch.