Pesky Bank 1 and 2 rich codes..p0172 and p0175....Wont go away! | Ford Explorer Forums

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Pesky Bank 1 and 2 rich codes..p0172 and p0175....Wont go away!

chezare

New Member
Joined
September 3, 2025
Messages
2
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City, State
Slc, utah
Year, Model & Trim Level
04 explorer xlt sport
Hello everyone, I'm a long time forum lurker and have had a 2nd or 3rd gen Explorer in my life for the past 10 years. I currently have a 2006 4.0 V6. She threw p0172 and p0175 codes a week and half ago. I was like cool no big deal, maybe I gotta do some refresh stuff. I went ahead and replaced, Air filter, MAF, all 6 Sparkplugs, code wouldn't go away...so I replaced all fuel injectors( i found some cracked insulators and O-rings that were bad, so replaced all of that), I smoke test the manifold and all vacuum hoses for leaks,,, no leaks, replaced all 4 O2 sensors. I just replaced the Solenoid vapor purge valve......AND,,,,,,nothing.... I'm perplexed. What am I missing? Has anyone experienced this and how did you fix? PLS help... Thanks!
 






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