Trouble Code: P0171 Fuel Trim System Lean (Bank 1) Possible Causes: Fuel Trim System Lean (Bank 2) Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.Trouble Code: P0174
Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.
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Usually answered in minutes!
If you can and need it,go to dealer and get oil change,they always scan your vehicle for free and will find this problem and tell you what it is and cost and you can decide to let them do it or do it yourself and you will find out for free what is wrong,just a oil change,I have the dealer do mine for this reason,something wrong,they will tell me.
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