This 1999 Lexus ES300 came in with the service engine soon light on. I did a quick code check and found code P0171 stored. Fuel system lean bank one. I believe in checking simple things first and the Mass Air Flow sensor is very easy to access and remove. One plug and two screws. Pull … Continue reading “1999 Lexus ES 300, Code P0171 Stored”
This 1998 Pontiac Grand Am Gt with a 3.1 Liter V6 came in with a surging idle and service engine soon light on. I checked codes and found a code P0171 stored for Fuel Trim System Lean. Sounds like a vacuum leak to me. I tested with propane and found that by adding fuel near … Continue reading “1998 Pontiac Grand AM GT, P0171”
This 2003 Ford Windstar came in with the service engine soon light on. Checking code revealed codes P0171 and P0174, banks 1 and 2 lean. I checked for vacuum leaks and none were found so I moved on to the Mass Air Flow sensor. It is common for them to get dirty and cause these … Continue reading “2003 Ford Windstar P0171 and P0174, Banks 1 & 2 Lean”