Empower Your Engine Unraveling the Mystery of Engine Code P0171

P0171 is System too lean, (Fuel Trim) bank 1 ... Here are your trouble areas ... Air Intake hose, loose or cracked ... Fuel line pressure ... Injector ... That's a lean code. Any unmetered air that gets in the system can cause that as well as low fuel pressure. If your canister hose was loose ... The surging rpms sound like the plastic hose from the intake to the turbo has a vacuum leak. Check both ends for fitness and take a good look at the hose. 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 ... B5 Models - Check Engine Code P0171 Bank 1 System Too Lean - I recently got a check engine light on my 2001 A4 Quattro with about 130K miles ... 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 indicates that the oxygen sensor in bank 1 has detected a lean condition (the engine either receives too little fuel or too much air). The P0171 engine code is serious—it means that your engine is running too lean in bank 1. Understanding the cause of a P0171 engine code can ... Autozone told me it was a P0171 code which means the fuel system is too lean....possibly due to a MAF sensor, Oxygen Sensor, intake leak, or any ... For More Info visit us at: http://1aau.to/h/cnF/ Is your car or truck suffering from a weak or hesitating engine?