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Posts Tagged: P0174 code

Fix P0171 code, P0174 code

Diagnose and fix a P0171 code, P0174 code What is a P0171 code, P0174 code? First, let’s understand what a P0171 code is. The official definition is P0171 System too Lean (Bank 1). On a V-6 or V-8 engine it’s often accompanied by a P0174 System too Lean (Bank 2). Bank 1 of a “V” engine is the bank that houses cylinder #1. A P0171 code and a P0174 code are the most common trouble codes for all car brands. They rate in the “Top Ten” of the most frequent … Read More


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