2005 taurus changed both o2 sensors still wont stay running 3.8 motor

Asked by Jan 19, 2015 at 11:34 AM about the 2006 Ford Taurus SE

Question type: Maintenance & Repair

codes 133,171,172,195.300,420 2195 come up

2 Answers


O2's won't help the running issue. I'd work on the other codes first. From the looks of the codes, I'd say clean the MAF and check for vacuum leaks.


that is a lot of codes. many of them point to a lean condition. check for vac/intake leaks, bad pcv dirty maf. codes 171 and 172 are opposite codes, rich and lean. I had this happen once and it was a bad pcv. there could also be a fuel problem. have the fuel pressure tested, and test the injectors. when was the last time the car had a tune up? There could even be exhaust leaks or a bad cat.. 195 is an oil temp sensor. if the car isn't running, then the oil isn't hot so that could be the sensor itself or wiring to it. I would start by checking for vac or intake leaks. then I would check the fuel system next. the fuel pressure tests can tell you a lot. Lot of codes here, but lean condition is a common denominator. Check everything associated with that

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