What causes a SPN 4107 code?

SPN 4107 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 4107 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 4107 active.

How do I fix SPN 4107?

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

Log in Sign up

J1939 SPN

SPN 4107

Allison transmission code P4107

What it means

Output Speed Sensor Circuit - Low Signal or No Signal detected while the vehicle is in gear or engine speed is high.

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free