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Check Engine Light , etc. V70-XC70 1999

there's a possibility the wrong sensor(s) were installed. happens alot, inside and outside the dealer. there's a bulletin detailing the new numbers and why they need to be done in pairs. the o2s breathe through the wiring itself to pick up reference oxygen and the new sensors do the job themselves or need an adapter harness, the bulletin details why or why not. good luck, chuck.






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