Unlock the Secrets of Engine Code P0171 Your Step-by-Step Manual

It came up "P0171 Bank 1 SysToo Lean" and the technician explained to me that I had a vacuum leak somewhere. Recently I was driving my car home from a 2hr road trip when my "Check Engine" Light came on. The code that popped up said that my system was ... code issue is lean condition bank 1 I replaced PCV valve and hose. I cleaned MAP sensor. I installed a hose clamp on passenger side vacuum ... P0171 is a lean code caused by a vacuum leak, mass airflow failure, faulty PCV valve, or low fuel pressure. I would start by checking all of the ... Code P0171 (system too lean - bank 1) ... my idle was perfect, vacuum was a was down a couple of hairs, car ran perfect... ... looks like i might ... Check the engine air intake duct for leaks/tears/holes, especially in the folds. It's a common source of a Murano vacuum leaks... This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the ... From TSB, P0171 - System Too Lean (Bank 1)The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code is set when the ... A trouble code P0171 or P0174 means the oxygen sensor or Air-Fuel Ratio (AFR) sensor (in bank 1 [P0171] or bank 2 [P0174]) has detected a lean ... What Does Code P0171 Mean? The P0171 is a diagnostic trouble code (DTC) that means, on the first bank of the engine, the fuel system is running weak or a vacuum ...