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2004 300M with a variety of PCM error codes related to the evaporative purge system and a variety of "fixes". Starting last year, would infrequently get PO440 (general evaporative system failure) and PO441 (evaporative purge system performance). Visually checked for missing/split/loose hoses. Changed gas cap to OEM gas cap. No real noticable improvement. Last fall, replaced the purge solenoid under the hood, and the codes went away for a long period of time. But in the last month, the codes started coming back every other day (I was killing them with my OBD2). So I got lazy and put it in the local Chrysler dealership, who said they did a smoke test, and replaced the evaporative canister which required dropping the gas tank, to the tune of $400. Then they said the PCM was bad and wanted $700. I drove it for a week, and now was only getting the 440 code, the PO441 code has not come back. So I replaced the PCM with another one myself, but the 440 code is still popping up every other day (after I erase it).
I am ready to do what I should have initially done, regarding checking wire continuity, replacing all rubber hoses etc. But I did want to put it out there to see if someone has any real world experience in ridding their 300M of the 440 code. Thanks.
I am ready to do what I should have initially done, regarding checking wire continuity, replacing all rubber hoses etc. But I did want to put it out there to see if someone has any real world experience in ridding their 300M of the 440 code. Thanks.