What causes a SPN 217 code?

SPN 217 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 217 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 217 active.

How do I fix SPN 217?

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 217

J1939 SPN 217 — Fuel/Air parameter

What it means

ECM Interior Temperature or internal thermal sensor error. This parameter monitors the air temperature within the electronic control unit to prevent overheating.