Posted by Michael Whitworth on July 21, 2005, 6:53 am, in reply to "Vauxhall/Vectra/1997/1.8/x18"
Was O2 sensor switching OK at time of these readings? Any fault codes flagged? What was lambda reading? What were other two gases, CO2 & O2.
I have my suspicions as to the cause of your problem but without answers to some of the above questions, I can't be sure.
Mike
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