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Check Engine Light misfires O2 sensor 850

posted by  LilHelpHere on  Fri Dec 25 23:02 CST 2015
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last visit: Wed Oct 15 22:09 CST 2014
[RELATED]

Hi, after the MAF troubles (cleaned not replaced), I replaced the coil, and cleaned the intake. A couple weeks later, CEL came on with O300 code and 6 others, O2 sensor. Some rough running but nothing major. Tech may have done sensor, but reset, and returned the car for the holiday. Light is back. Running OK, not amazing. I checked a couple plugs -OK. I've read about barking up many trees and replacing lots of stuff, but any great solutions? PS, coolant level went down a bit over couple months with no obvious signs of leak. Pressure test planned on Monday, and oh yeah, ABS light . Brakes slightly growl, replaced one hub, only a bit better. Ugh 244K -beginning of the end?






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