po 171 code

5

Asked by Oct 31, 2015 at 02:22 PM about the 2008 Chevrolet TrailBlazer LT1 4WD

Question type: Maintenance & Repair

check engine light is on getting a po 171 code. car is running fine

1 Answer

68,615

This is a lean condition. In other words, either not enough fuel is reaching the cylinders or too much air is getting in the cylinders. Most common causes are a vacuum leak or faulty upstream oxygen (O2) sensor. HTH. - Jim

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