FINALLY SOLVED! P0171 and P0174 Codes!!!!
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Hey, I think you may have just saved me a ton of time and frustration chasing the same 2 codes. I moved the control valve when the engine was at idle and it smoothed out. I cleared the code and it hasn't returned. So we'll be watching this one and will replace the control valve if it returns. Thanks a million for posting this. ![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
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Agrinja
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08-12-19 02:10 AM
hksimpson
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11-07-06 05:46 PM