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I have a 1998 Blazer 4 SWheel drive, 4 Door. V6. I had a service engine light

(1999 Saturn SL2)
in Hickory, NC on January 13, 2015
Come on and took it to get it fixed. They replaced the P0143 sensor and the light went off. 80 miles later, the light came back on. Took it back and they said they switched out the sensor, thinking the first one was bad. Everythign else looked good. Then 80 miles later, Service Engine Light, came back on. Now, i took it to a rtepair shop where they run every test they knew and everythign passed. They said no reason the light should be on and they can't fix it. Any help out there would be appreciated, thanx Steve
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Popular Answer
on January 13, 2015
It needs more testing thats going to take more time
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on January 13, 2015
Thanx. I did have the Cat converter chaged out about a month ago, so, that's new, i don't think that is an issue now. And also, need to know what other tests can be run to find out.
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