What causes codes P0171 and P0174?

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14714 In Progress 2014 Chevrolet Tahoe 2014 public

Comes on sporadically.

Sparky

The codes are setting because of a lean condition there can be many causes  but the most common causes are air/vacuum leaks. Look for loose hoses/clamps and listen for air noises.

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