SOURCE: oxygen sensor 2000 2 liter Tracker
You have an heated Oxygen sensor. 2 of the wires heat up the sensor and keep it at a certain temperature, it is turned on and off by the computer. The other 2 are use to send a very low voltage reading back to the computer to tell the computer if the engine is running rich or lean. I don't have a diagram to tell you which wire does what but you can get a manual and that should give you the information that you need and tell you how to trouble shoot it to tell if the sensor is bad or not, you may want to look for a wire laying on the exhaust, I have found wires burnt and lay on the metal.
SOURCE: trying to find where a ground wire connects to
Wire could go to rear of cylinder head. Going from the firewall to the master cylinder really does not make much sense as that assembly is bolted to the firewall and is grounded there. Generally most systems have multiple ground points, which is why you likely don't have any problems other than finding a home for that wire. On lots of vehicles I've owned, when there was a question about reliable grounding, I ran a 12ga or heavier wire from the battery to engine, firewall, dash and fenders, independent of all factory grounds. It's overkill, but I've never had a ground problem either!
SOURCE: My 2003 Tracker 4-cyl 2.0L quit going down the
Yes it can. Usually a cam sensor (on GM's) will cause it to go into 'limp' mode. I do believe it is a timing belt on this model. Hopefully that did not break. If it did the engine would definately sound "different" while trying to start.
Testimonial: "Thanks for the suggestions. I decided to remove the cam cover. The upper timing chain had broken on the left side cam. Motor had been run low of oil."
SOURCE: If the Correlation between the
It could be a fault with one or both of the sensors (they can and do fail occasionally). If both sensors are good and the wiring to them is ok, then your timing belt has likely jumped at least one tooth.
Try twisting cam sensor terminals just a bit,it could be contact problem
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