I took my car to AutoZone because I had the Service Engine Light on. They told me that an oxygen sensor had no activity. So I looked under the hood and under the car and only found two sensors. Autozone told me that there were four. 2 upstream and 2 downstream. Buick sure hid them well. Does any one know where the other 2 are?
How many oxygen sensors are in a 04 Buick park Ave ultra? and where?
- Thread starter Gus
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