What causes a SPN 3508 code?

SPN 3508 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 3508 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3508 active.

How do I fix SPN 3508?

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 3508

J1939 SPN 3508 — Body/Chassis parameter

What it means

Sensor Supply Voltage 1 - Circuit Voltage Above Normal, or Most Out of Range. This code relates to an internal reference voltage or supply rail specifically allocated for body-chassis interface sensors.