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1998 Ford Ranger oxygen sensors go out every 3 months puts out codes po171 po174 each time what could be causing sensors to go out?
Wiki User
∙ 18y ago
It's important to buy genuine Ford parts. If you are not, this is probably the reason it continues. Also, check the reader on your mass air sensor (it's a wire). If it has crud on it, it will tell the engine that there is not as much air going through it then there really is and the motor will run lean.
Wiki User
∙ 18y ago
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