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Old 11-27-2007, 04:17 PM
nsomniac4u
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My girlfriend has an 02 xterra (N/A) and is having the same problems. The dealer is saying that the knock sensor is shorting out so bad that when they try clearing the code to get around it and find out what's really wrong, it immediately trips and won't let them bypass. She's gotten a cat code twice now, but after the last time clearing it they couldn't get it to repeat. The injectors were really clogged, so they cleaned them and now we are stuck with a rough idling vehicle with no idea what's wrong. She has decreased power and gas mileage, so my immediate thought was it is the 02 sensor, any other thoughts? I will be searching for a walkthru on the o2 sensor replacement. It doesn't make sense to me to pay $550 to replace an unnecessary K/S just to find out what's wrong. Oh, and it has 120k miles with timing belt, distro cap, spark plugs, water pump all changed in the last 5k.
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