In this video I solved my P0171 or P0174 issue on my Nissan Frontier. This can be applied to Xterra and Pathfinder with the VQ40DE engine. This process can also be applied to many modern engines as well. I go through the steps of check the intake, vacuum lines, MAF sensor, 02 sensor, brake booster and catalytic converter. The issue I had was related to a cracked hose in my oil catch can which is connected to the PCV system on the engine.
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Solving P0171 And P0174 Lean Check Engine Light On A Nissan Frontier
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