I left without getting print out but I have both the upstream and downstream sensors throwing codes. 2007 Pontiac Grand Prix. Any ideas of what would through both?
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I left without getting print out but I have both the upstream and downstream sensors throwing codes. 2007 Pontiac Grand Prix. Any ideas of what would through both?
The catalytic converter seems to be fine. Don't know if that matters.
Thanks that helps :-)
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