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PO441 and PO443

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  • PO441 and PO443

    all right. Autozone helped me out. I'm getting PO443 and PO441 on my check engine light. Anyone got any suggestions? I'm mechanically inclined, but I don't really know that much about cars. I know (if possible) I can fix it myself, but can someone be specific about location and stuff. I've heard suggestions about charcoal filters, solenoids and vacuum leaks. What is all this nonsense. Thanks guys.
    97 TJ...1\" BL...2\" RE Spacer Lift...No AC in Vegas

  • #2
    My OBD II Troublecode list is here.

    P0441 Evaporative Emission Control System Incorrect Purge Flow
    P0443 Evaporative Emission Control System Purge Control Valve Circuit
    Basically your vehicle places a vacuum on the gas tank to suck out any fumes that maybe in there. The purge valve controls that, and transfers everything through the evap canister. Its just an emissions thing, nothing that will hurt your Jeep in any way.

    On the driver side, grille side of the master cylinder, down low is the purge valve, its got a round disc on top has some vacuum connections on it, and one electrical connector going to it.

    First thing to do is go over all those vacuum lines going between the purge valve, canister filter, and the leak detection pump (the other round thing near the purge valve).
    95 YJ: 4.0, AX15, SOA, RE SOA Springs, 1" shackles, 1" body, SYE, locked 44, locked 8.8, high steer w/crossover, 37x12.5's on 15x10 beadlocks, OBA, winch, and a few other things. My Build Up Post -- Photos -- Jeep FAQ -- Mike


    • #3
      All right. What's the next step? I looked at all the hoses. Everything seems fine. For what it's worth...I think there might be an electrical problem. My oil pressure gauge has bottomed out and stays there. Could these be related?
      97 TJ...1\" BL...2\" RE Spacer Lift...No AC in Vegas