Error code
Infiniti All models code P0171
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Meaning
System too lean, Bank 1. Vacuum leak, dirty MAF sensor, low fuel pressure, or failing upstream O2 sensor. On the VQ35DE in the FX35 and G35, intake manifold gasket leaks are a documented cause at higher mileage. Smoke test for vacuum leaks before replacing sensors
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Address of this page: https://www.remfixit.com/tr/infiniti/tum-modeller/p0171