FINALLY SOLVED! P0171 and P0174 Codes!!!!
04-24-24, 06:39 PM
#46
1st Gear
Join Date: Apr 2024
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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. 
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