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PO171 and 174 codes

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Old 10-04-2016, 06:39 AM
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Default PO171 and 174 codes

I recently replaced both pumps in my '96 300-6 auto and now getting PO171 and 174 codes. I have looked on line at the 8 or so suggested things it could be. I was wondering what people have found that usually caused this problem. I'm sure there probably is one item that happens more then others and I think I will start there.

Thanks for any help.
Old 10-04-2016, 08:14 AM
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Assuming the pressure is good on both new pumps, I'd start with vacuum lines and cleaning the MAF sensor.
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