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emmisson light on 2007 Ford Five Hundred

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
emmisson light is on what are the cost for all for?and should they alll be changed at the same time ?there are 4 is that correcte
(1) Answer
Your emission light being illuminated does not necessarily indicate a oxygen sensor issue. It will be wise to perform a diagnosis since guessing is not cheap. Many emmission components have coverage beyond the normal warranty. Call the local Ford dealership and ask what coverages that might apply to your vehicle.