That check engine light might be an indicator that your O2 sensor has gone bad. It's no longer able to send information back to the engine control unit. This negatively affects the air-to-fuel ratio. It's important to heed warning signs and get a new O2 sensor for GMC Acadia from AutoAnything today.
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Many oxygen sensors become damaged due to an oil or coolant leak. If this is the case, it's vital that the leak be found and repaired before replacing the sensor. A few signs of a bad sensor include a check engine light on, hard starts, high gas mileage and failed emissions tests. This is because a faulty sensor causes your car to run rich. Acadia oxygen sensor replacements come with a 1-Year, Lower Price Guarantee when purchased at AutoAnything.