hey everyone, i have a 97 lude sh and i just on a check engine code P0171 system too lean in bank one. anyone ever had this problem and any ideas how to fix it?

any help is great,
thanks

 

From what I've seen, it could be a multitude of issues. Alot of people seem to have different fixes to resolve the issue. These were most of the common ones that seemed to fix that issue. The most common seemed to be fuel filter and o2 sensor sending a false cel because it is going out. But here are some of the other ones I have seen.

Fuel supply system, Primary O2 sensor, MAP sensor, contaminated fuel, valve clearance, exhaust system.

Hope that helps.

 

Did a little research and alot of people said cleaning or replacing IAV fixed their issue too. I'd start with the cheaper items and go from there.

 

hey man im new here and that helps a ton.

thanks alot