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5 Posts
Well I am on a hugh bug hunt. My 2001 Hyundai Santa Fe that I am giving my 16 year old son is throwing the code p0171 to lean bank 1. It has a major tuneup including PCV valve, I cleaned the Mass Flow, replaced the upflow sensor and had the exhaust manifold soldred by a radiator show because it had a small crack. So I was driving today and again it popped up-WTF. I am at my wits end, I guess the Mass Flow could be bad but I doubt it.-Thank You