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2000 Dodge Stratus 2.4L P0441 Incorrect Purge Flow After Filler Neck Replacement and LDP Repair

Model: 2000 Dodge Stratus 2.4L Fault Code: P0441 Posted: 2007-09-13 21:25

Vehicle History: - A P0442 error was initially detected, leading to replacement of the Leak Detection Pump (LDP). - Subsequently, a P0455 error appeared due to rusted filler neck, prompting its replacement. - Currently, a P0441 code (Incorrect Purge Flow) is present with the MIL illuminated (Code 113). Question: Should I test the Purge Control Solenoid by placing my hand on it during operation to feel or hear for clicks when cycling? The code emerged after the filler neck replacement and only appeared after the Powertrain Control Module (PCM) was cleared. Could the vent hose or gas tank inlet hose have been disturbed during installation, affecting components above the fuel tank? While some suggest a faulty gasoline cap, I question its likelihood given the sequence of events. Additional concerns: Is it possible that the vacuum lines connected to the LDP are incorrectly wired? Given the vehicle's age and known EVAP system sensitivity, could a leak or improper connection in the evaporative emissions system be contributing to this issue?

Related fault codes
P0441
Comments (5)
Anonymous 2007-09-14 07:13

I suspect the vacuum lines connected to the LDP may have been reversed during installation. This is a common error and can trigger P0441 codes even if the LDP itself is functional.

Anonymous 2007-09-14 08:15

The P0441 code didn't appear earlier because the filler neck's rust holes were initially small, allowing limited leak detection. After replacement, structural damage worsened due to a dropped fuel tank, leading to increased leakage—this explains the progression from P0442 (small leak) to P0455 (large leak). The owner likely didn't inspect the filler neck before replacing it. (Hello neighbor!)

Anonymous 2007-09-14 08:25

While P0442 due to LDP issues is rare on the 2000 Dodge Stratus, it does occur. More commonly, P0440 or P0441 codes appear. A P0441 (Incorrect Purge Flow) typically points to an issue with the LDP system—however, if the new LDP appears functional, potential causes include vacuum leaks or system malfunctions. Performing a smoke test can help identify hidden leaks. Ensure all connections are secure and verify that the LDP is properly installed and functioning under vacuum. Also check the LDP vent valve to confirm it maintains proper vacuum pressure.

Anonymous 2007-09-16 13:17

Don't overlook the gasoline cap—ensure it's sealed correctly. Inspect all vacuum lines and valves in the evaporative emissions system, both near and far from the fuel tank. Follow the standard EVAP system diagram from the fuel tank to the engine. Look for cracks, blockages, or disconnections. Additionally, verify that the new filler neck is properly installed and not defective. A full EVAP system inspection is recommended.

Anonymous 2007-09-16 21:11

I strongly suspect the vacuum lines connected to the LDP are reversed. After I mentioned this error to a mechanic, he also pointed it out. Another user previously suggested that the purge control solenoid lines might be swapped—this was checked before the LDP replacement. Two different dealership service departments have ruled out a faulty gas cap as the root cause.