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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...   2020 suburban new transmission and issues after install recently had the transmission fail at 11...

Search Auto Parts Search code problems Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes dmccra New User Jan 21, 2014, 12:14 AM Post #1 of 3 (1681 views) code problems Sign In  year of vehicle,2005 make chevy,cobalt 2.2, 104,000 mile Every once in a while, maybe about once a yr. My engine check light come on. The code reader reads read 2 codes 171,po171 The engine runs great though, so I clear the code with the code reader then the engine check light goes off It stay off for about another yr. The research I did points to the maf sensor. What is your opinion on this Hammer Time Ultimate Carjunky / Moderator Jan 21, 2014, 3:34 AM Post #2 of 3 (1661 views) Re: code problems Sign In That means the engine is running too lean and the computer has reached it's adaptive limits/ Erasing the code doesn't resolve anything. You need to find the cause of the lean mixture. Look for vacuum and air leaks first. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Discretesignals Ultimate Carjunky / Moderator Jan 22, 2014, 6:27 PM Post #3 of 3 (1613 views) Re: code problems Sign In You also need to look at what they call freeze frame data when the codes are set with an enhanced scan tool. The freeze frame data has a list of data stream parameters that was recorded when the code triggered. A good tech can use that information to see what kind of lean condition it is and possibly determine how to duplicate it. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. (This post was edited by Discretesignals on Jan 22, 2014, 6:28 PM)   Email This Post   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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