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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.

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โˆ™ 2005-11-12 03:50:34
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Q: 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?
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