Jeep 99 Grand Cherokee PO441 Code: What It Means and How to Fix It
I have a 1999 Jeep Grand Cherokee with a diagnostic code PO441, which indicates an issue with the Evaporative Emission Control System (EVAP) — specifically, an incorrect purge flow. I'm not sure what this means technically or how to fix it. Can anyone help me understand the cause and provide steps for resolution? Thanks, Jim.
The PO441 code is quite common in Jeep Grand Cherokee and Dodge vehicles. It typically points to a faulty LDP (Low-Pressure) vent valve or a leak within the EVAP emissions system. Checking for vacuum leaks and inspecting the purge valve are key troubleshooting steps.