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Check engine code p0420,p0432 2001 4.0

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  • Check engine code p0420,p0432 2001 4.0

    Wanting to know if I'll be needing to replace the two cats below exhaust manifold?
    Last edited by Black widow; 03-18-2012, 12:52 AM.
    3" Full traction lift,Smittybilt bumpers & rock sliders,456 nitro gears,Ected lockers,33" toyos.

  • #2
    While that's a possibility it could also the O2 sensors, or it could he a fluke. I would reset it and.wait and see if those codes come back. If the liht stays off don't worry about it, if it comes back on then its time to investigate further.
    95 YJ: 4.0, AX15, SOA, 4" leafs, 1" shackles, 3" body, SYE, CV driveshafts, 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 -- SWB FAQ -- Mike

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    • #3
      Already replaced all 4 02 sensors,light went out for a little while,but came back on.Milage has went down since last fall.
      3" Full traction lift,Smittybilt bumpers & rock sliders,456 nitro gears,Ected lockers,33" toyos.

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