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Trouble with check engine light every time I drive the car

(1994 Mercury Grand Marquis)
in Natchitoches, LA on September 08, 2010
Check engine light keeps coming on. Every time I drive the car. Advised by the mechanic that the sensor light needs replacing What would the cost be for this.
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Popular Answer
on September 08, 2010
Hard to tell which sensor they are talking about, But its usually the oxygen sensor and you can check that price here https://repairpal.com/estimator/mercury/grand+marquis and get another opinion here https://repairpal.com/mercury-repair-in-natchitoches-louisiana
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