What causes a P2407 code?

P2407 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 P2407 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2407 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.

OBD-II

P2407

Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent

What it means

The Engine Control Module (ECM) has detected an irregular signal frequency or erratic voltage from the Evaporative Emission (EVAP) leak detection pump sense circuit. Note: This code primarily applies to gasoline-powered auxiliary units or specific light-duty hybrid systems often integrated into vocational chassis.