When Monitored

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic runs once per trip when the following conditions are met:

Barometric Pressure Above 75 Kpa
Ambient Temperature Between 4.4°C (40°F) and 35°C (95°F).
With the engine running.
Engine speed between approximately 1100 and 3300 RPM.
Fuel Tank Isolation Valve (FTIV) Closed.
No Active FTIV Related DTCs.
No Change-Over Valve (COV) circuit DTCs.
- Engine has sufficient vacuum. This fault sets when the engine is operating naturally aspirated creating intake vacuum and a purge flow fault is detected.