What causes a SPN 202 code?

SPN 202 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 202 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 202 active.

How do I fix SPN 202?

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 202

Engine Front Crankshaft Seal Pressure

What it means

Measures the air or oil pressure at the front crankshaft seal, used for diagnostic monitoring.

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

Log in Sign up free