peterjiang4648 Posted July 26, 2022 Share Posted July 26, 2022 2009 RX350 trouble code P0171&P0174 I used another vehicle's mass air flow sensor to replace my car's mass air flow sensor. And through the similar method I replace the B1S1&B2S1. but the long FT was still high. I have no idea about the problem. I attach the "trouble code.jpg"、“700 rpm mass air flow.JPG”、“700 rpm short FT & long FT.JPG”、“1800 rpm mass air flow.JPG”、“1800 rpm short FT & long FT.JPG”. Quote Link to comment Share on other sites More sharing options...
RX400h Posted July 26, 2022 Share Posted July 26, 2022 Here's an interesting read: FINALLY SOLVED! P0171 and P0174 Codes!!!! - ClubLexus - Lexus Forum Discussion Quote Link to comment Share on other sites More sharing options...
peterjiang4648 Posted July 26, 2022 Author Share Posted July 26, 2022 1 hour ago, RX400h said: Here's an interesting read: FINALLY SOLVED! P0171 and P0174 Codes!!!! - ClubLexus - Lexus Forum Discussion Thank you so much, I will read it carefully. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.