2nd Gen Dakota Tech 1997 - 2004 Dodge Dakota Tech - The ultimate forum for technical help on the 2nd Gen Dakota.

Code P171 FIXED

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Old 06-10-2019, 11:26 AM
kirmy22
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Default Code P171 FIXED

FYI, I have a 2000 Dakota 3.9 got the engine code p171 when the check engine light came on, the truck would idle rough and lose a lot of power,fuel mileage would go from 19 to 9. I couldn’t find any vacuum leaks, I did everything including changing the spark plugs. I decided to pull the upstream 02 sensor , it was completely covered in a thick black soot , replaced it and problem fixed. Never got a 02 sensor code Hope this helps someone down the road.
 

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