P0171 runs too lean, usually need to

 clean airflow sensor. Where is the noise came from?

所有跟帖： 

• 前麵, 下麵. 去年換的MAFsensor. -knp- ♂ (0 bytes) () 06/02/2011 postreply 12:11:24

• now I am 80% sure. there is a leaking before bank1 sensor1. -nonego- ♂ (153 bytes) () 06/02/2011 postreply 12:49:46

• possibly 2. one behind firewall, another seems under passenger s -knp- ♂ (67 bytes) () 06/02/2011 postreply 15:32:47

• because exhause leaking -nonego- ♂ (235 bytes) () 06/03/2011 postreply 06:26:52