What causes a P009B73 code?

P009B73 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 P009B73 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P009B73 active.

How do I fix P009B73?

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

OBD-II

P009B73

Fuel Pressure Relief Control

What it means

The actuator jammed in the closed position

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

Log in Sign up free