I am not a car expert but have over 50 years experience with cars--I would put the old sensor back and see what happens---codes can be misleading----also from recent experience is this a dbw or drive by wire vehicle? Has a throttle cable and or a cruise control cable? you might want to do some research on the IAC if has one---Idle air control which is cheap and easy to replace in most cases and can even be cleaned in some cases to cure idle at start or stop situations.
You may also have put a defective part in the vehicle, never rule that out as not possible
SOURCE: how to replace EGR valve on 99 Chevy Tracker
Take off your EGR valve and clean it out with carb cleaner also
grease tyhe little screw thing in it,,, u will c what i mean if u take it apart. carbon builds up in the chamber. it is located at the back left side of your engine and is a bit of a pain to take off. this should save u the cost except for the cleaner and labor. i had the same problem cheapest i found was 90$ on ebay.
SOURCE: 1995 chevy corsica will not stay running after it
Need more Info. What dies motor? Battery? both?
SOURCE: 99 chevy tracker is running very rough at idle
yes both of these items can cause your problems
SOURCE: My 2001 Chevy Tracker quits running after a while
Had the same problem with my tracker. Replaced the camshaft position sensor(easy to do yourself, takes about five mins.) Now can drive at highway speeds for about a half hour and stop at the gas station and she'll start back up and run fine. Before i had to wait at least 15-20mins before she would start. Also, if your service engine soon light is on take it to the national chain auto parts stores and they will hook up the code reader for free. The sensor runs about $120.
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