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The Comprehensive Guide to Engine Code P0171 Fuel System Mastery

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A dirty or faulty MAF sensor can send incorrect information to the ECM, causing the engine to run lean and trigger the P0171 code. Faulty Fuel ... 2nd Generation (GE 08-13) - Engine light P0171 - Error code P0171 refers to lean Air/Fuel mixture in Bank-1. The cause of the problem can be ... It's very possible that you do have a vacuum leak. The only real way to find out is to get a hold of a scanner that you can monitor the O2< ... the same lean code on both banks indicates it is a fault that affects the whole engine, so less likely to be an O2 sensor. I would take another ... a problem with the AF sensor · a small error in estimation at the ECU of when air should be passing the AF sensor from each bank · injectors that ... When the code says that the fuel system is "too lean," it means that the computer has been adding more and more fuel, which is called Long Term Fuel Trim. P0171 means the computer is correcting for a lean condition on bank 1 (the rear bank.) A lean condition can be caused by any number of things. p0171 code (lean bank 1) ... The O2 sensor only cuts in (closed loop with ECM) once the engine has warmed up and coolant temp has exceeded 158F/ ... The P0171 code means your engine is running lean, with too much air and not enough fuel. Common causes include vacuum leaks, ... The P0171 code means that the engine is running too lean on bank 1, which is the side of the engine that has cylinders 1-3. This can cause ...
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