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Oxygen sensor
Hi, all
I had my Metro for 8 years, its an 89 model with 202,600 miles on it and still running good. However, recently I noticed a big reduction in gas milage (it's got down to 28 MPG). The compression is good. I believe it is a bad oxygen sensor. But when I disconnected it, the check engine light never came on. Any ideas why? Where is no point of replacing the sensor until this mystery is resolved. Please help!
Thank you
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