Autozone CEL print out below.
Welcome to
Just picked this up from a reputable dealer. Jeep passed inspection, drove about 50 miles. Light came on on a cold night while idling. No other noticeable probloems or sounds, knocking, rough idle etc. This is my 2nd XJ so I can easily say there is nothing noticeably wrong with her. Drove about 50 miles today with light on and still nothing out of the ordinary.
Couple of possibilities:
1) Dead oxygen sensor. What's the mileage on this XJ?
2) Bad sensor wiring. Less likely but still possible.
There are others, but those are the two usual culprits.
I'm non technical but am fine pulling a fuse or replacing a sensor so long as I know where exactly it's located. Don't have any diagrams tho.
It's pretty easy from underneath: follow the exhaust down towards the rear from the manifold. As you head towards the back, you'll notice some cylinders with wires sprouting out of the top that are screwed into the exhaust itself. Those are your oxygen sensors. Removing them is easy: unplug the wiring connectors, put a wrench on them, and turn. With any luck they won't be rusted in place
Here's the fun part: determining if your XJ is Federal- or California-spec emissions. Where it was bought or originally sold doesn't necessarily matter in this regard; looking is the best way to tell.
Method 1: lift the hood. On the driver's side against the firewall there will be a large white label. There will be something to the effect of, "This vehicle complies with all [...] standards for the 2000 model year" written on it. Replace "[...]" with Federal and/or California as appropriate.
Method 2: As you locate the oxygen sensors, keep count. If you only have 2, it's Federal emissions. If you have 4, it's California emissions. Federal-emissions vehicles will also only have one catalytic converter; California-spec vehicles will have two catalytic converters and a pre-cat near to the exhaust manifold.
Reason I mention this difference is that the part numbers for oxygen sensors are different depending on whether it's California- or Federal-spec. Make sure you get the right ones for your particular setup. I suspect that you're going to be California-spec, though - NY has used CA emissions standards for some time now, and the printout mentions Sensor 2, Bank 2 as being bad. My recollection is that Bank 1 applies to the two sensors closest to the manifold on both Federal- and CA-spec XJs; Bank 2 only appears on CA-spec XJs and refers to the two rearmost sensors.
BTW: if you've only got 50 miles on this since you bought it, you may want to take it back to the dealer and see if they'll take care of it. Probably a long shot and your call, but figured I'd mention it.
