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ODB2 Codes for P0171 Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes mgpotter New User Jun 7, 2018, 9:48 AM Post #1 of 3 (2660 views) ODB2 Codes for P0171 Sign In Need some help figuring out these codes to see if they help find the issue. DTCFRZF P0171 Chevy Malibu 2010 LS 2.4L (B) 137,000 miles FUELSYS1 CL FUELSYS2 N/A LOAD_PCT (%) 25.5 APP_D (%) 17.6 APP_E (%) 8.6 TAC_PCT (%) 7.1 EQ_RAT 0.999 TP_R (%) 4.7 ATT (F) 75 TP_B (%) 18.8 BARO (inHg) 28.6 CATEMP11 (F) 1252.40 VPWR (V) 14.855 LOAD_ABS (%) 25.8 FLI (%) 55.3 WARM_UPS 1 CLR_DIST (mile) 7 EVAP_VP (inH20) 0.084 MAF (1b/min) 10.6 TP (%) 18.4 RUNTM (sec) 110 EVAP_PCT (%) 10.6 RPM (/min) 709 VSS (mph) 0 SPARKADV (*) 4 IAT (*F) 100 ETC (*F) 180 SHRTFT1 (%) 12.5 LONGFT1 (%) 29.7 MAP (inHg) 12.1 tdigreg User Jun 7, 2018, 10:01 AM Post #2 of 3 (2654 views) Re: ODB2 Codes for P0171 Sign In What are the symptoms? Just a quick search of that code show that most often a MAF fixed the problem. No guaranties. Check your fuel pressure should maintain 50-60psi. at all loads. You can rent testers from most auto parts stores. You could try some injector cleaner in your fuel as well. (This post was edited by tdigreg on Jun 7, 2018, 10:34 AM) Discretesignals Ultimate Carjunky / Moderator Jun 7, 2018, 10:47 AM Post #3 of 3 (2635 views) Re: ODB2 Codes for P0171 Sign In If fuel trims improve at higher engines speed, look for vacuum leaks also. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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