What causes a P2444 code?

P2444 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 P2444 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2444 active.

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

OBD-II

P2444

Secondary Air Injection System Pump Stuck On Bank 1

What it means

The Engine Control Module detects that the secondary air injection pump is operating when it should be deactivated, causing incorrect oxygen levels in the exhaust stream.