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o2 sensor

  1. 98 ZJ Downstream Oxygen sensor wire routing

    Jeep Grand Cherokee Lounge-ZJ/WJ
    Hi folks, I've got a '98 ZJ 4.0 that won't pass emissions. Turns out the PO cut the Cat and downstream O2 sensor out at some point in the past. This is a project for me and it's new back on the road and the first time it's needed inspection since getting back on the road. The upstream sensor...
  2. So, Workining on Code P0430....

    Jeep Grand Cherokee Lounge--WK
    Was told by a mechanic that my catalytic converter went bad and the O2 sensors were fine. So, I took the plunge. I ordered and bought a new Y pipe cat assy (not from the stealership). Myself and friend installed it (don't do this without a hoist :D), cleared the codes and the engine light came...
  3. About to buy a Laredo - O2 sensor & lower engine trembling

    New Member Introductions
    Hey guys, I looked at a '94 ZJ Laredo (4.0l, auto) today and I'm interested in buying it. All-over it's a good clean Jeep although there's a couple of issues I wanted to check before purchasing. When idle, there's a slight tremble from what feels to be the bottom of the engine. There doesn't...
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