What causes a P204F93 code?

P204F93 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 P204F93 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P204F93 active.

How do I fix P204F93?

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

P204F93

Characteristics of the SCR system - dosing failure

What it means

Does not work

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

Log in Sign up free