I purchase both the O2 sensors from my Cobalt sad part is my terrible memory won't let me recollect which one is which upstream and downstream can you give me some clues please PS it does not say which one is which on the boxes
The connectors are different if you bought the plug and play. They may look the same but they are keyed differently. Did you buy ACDelco replacements?
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Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716
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