What causes a SPN 222 code?

SPN 222 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 222 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 222 active.

How do I fix SPN 222?

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 222

J1939 SPN 222 — Fuel/Air parameter

What it means

SPN 222 involves the Turbocharger Boost Pressure Sensor - Data Erratic/Intermittent. It monitors the air pressure in the intake manifold.