Empower Your Engine Troubleshooting Engine Code P0171 Like a Pro

DTCs P0171 and P0174 are generic codes that set when the feedback on the engine's air/fuel mixture becomes too lean for the Engine Control Module (ECM) to ... P0171 is a code indicating that the engine is experiencing a leaner fuel mixture than what's commanded (too much air or not enough gasoline). To diagnose P0171, see the Possible Causes below. Check fuel pressure. It should be about 55 psi (380 kPa). If it idles OK, try 'power braking' ... P0171 is a "System too lean" error code. This is caused by the engine receiving more air than fuel so it compensates by adding more fuel ... 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 ... Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/433/k/scan-tools-code-readers Your check engine light is on, and you got the code ... For More Info visit us at: http://1aau.to/h/cnF/ Is your car or truck suffering from a weak or hesitating engine? How I diagnose and troubleshoot an engine P0171 Code: System Too Lean (Bank 1) A lean condition exists if the engine is getting more air ... The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. This trouble code indicates that the engine is running too lean, which can lead to various issues if left unchecked.