because exhause leaking

来源: 于 2011-06-03 06:26:52 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

 your bank1 sensor1 detects more o2 then usual. The system thought it's lean and  gave you  p0171 code. Check leakage first and fix it.  if still get same code then clean air flow sensor again.