Question about 2006 Hyundai Sonata

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My check engine light was on in my car so I brought it to my dealer. They said the code said intermittent lean condition? but could not find any problem. They told me I should change the fuel filter. I was on my way to the states when this happened and as I crossed the border I noticed I was burning a lot of gas. I phoned the dealership and they said it was probably the switch in the gas tank to keep going. I could literally see the needle moving on the gas tank and I burned over 1/2 a tank of gas going 150 kms or 90 miles. The dealer told me to check for a leak when I filled up and there wasn't one? I turned back because I was nervous there was something wrong with my car. The guard at the border searched my car of course when I came back into Canada and told me there was something seriously wrong with my car as he could smell gas in my trunk and in my back seat. When I pulled into the garage the next morning the whole bay smelled of fuel. The service guys took my car and told me that all it was, was there was a clip on the fuel line was not on right and that was why you could smell gas but there was no gas leak and I was safe to go on my 2000 mile holiday. I asked why my car had burned so much gas when I should be getting better gas milage with a new fuel filter and the girl at the desk told me it was because my 2006 sonata had 140,000 km's and was old. I said I never burned that much gas on the way here? They said they felt perfectly safe sending me on my way. My gas milage was back to normal on my trip. My engine light came on again in Nashville and I could feel my car had some hesitation while I driving. The garage there said the purge valve and the close valve were defective and to change them and see if lean codes returned. I called my friend who is a mechanice and told him all that was happening and he told me that the dealer in Canada must have hooked up the fuel lines wrong and sent excess fuel into the cylinder and burned out the valves.The lean codes returned before I got home. I called and left a message at the hyundai dealer but they never returned my calls. My car started to smell severely of gas but I did not have money to take it into a garage. I was terrified because I have talked to 3 different mechanics and they all say that if the excess fuel my car was putting out went into my engine all my seals will start to loosen and my car will basically fail. My car started developing a funny smell and gas smell is toxic when the car idle's. I brought it to another mechanic in town and he said my car si burning raw fuel and my engine is developing a knock. I was talking with cousin who is a mechanic and told him a bout the gas smell and he told me to quit driving my car because raw gas means my car could explode.My cousin tolf m the once his fuel injector got stuck on his car and the excess fuel made his catalitic converter burn red hot and wrecked it so he then told me the excess fuel my car put out could have also made my catalitic converter run red hot and overheat and burn out. The dealer recently called me for a service remeinder and I told them about my car problems. The service guy did call back then and say he never got my message and they did tow my car to WPG and it is my cadalitic converter and they think I should be paying for it. They said they checked the work they did to make sure there was no gas leak and so they did nothing wrong to my car to make it burn all that excess fuel...I asked what the code said when I brought it back and they said they never checked anything else to see why my car was burning all that extra gas they just sent me on my way because they knew I was going on a trip and wanted to get going? I said if I had just wanted to get going I would have kept on going I wanted to go safe that is why I got my car checked in the first place and why I turned back from Grandforks I knew something was wrong with my car!! They have no record of my car being brought back into the dealership the day after they changed my fuel filter and no report was ever made to say what happened to my car or what they had to do with it that morning before they sent me on my way? But like I said my gas milage did return to normal when I left/

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There must be a leak if you smell gas in the trunk. Very dangerous, needs to be repaired. Do not drive, unsafe.

Good luck to you.

Posted on Jul 05, 2010


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I have a tailblazer 2006 that gives the obd code po171 i need a graft that shows what all it could be

Trouble Code: P0171

Fuel Trim System Lean

Possible Causes:

Test for fuel contamination. Small amounts of water can be delivered to the fuel injectors and cause a lean exhaust indication. A lean exhaust indication can also be caused by too much alcohol in the fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .The system will go lean if an injector is not supplying enough fuel.A lean condition could be present during high fuel demand due to a fuel pump that does not pump enough fuel.Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Intermittent Conditions .

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I have a 2006 Chevy Colorado..Check engine light on and code 171 came up. Oxygen sensor replaced as was gas cap..Still on..What else needs repairing to fix this??

Trouble Code: P0171

Fuel Trim Too Lean

Possible Causes:

The current cell can be observed using a scan tool.The system will go lean if an injector is not providing enough fuel.A lean condition could be present during high fuel demand due to a fuel pump not pumping enough fuel, plugged fuel filter or a restricted fuel line.Insufficient fuel in the tank or low fuel pressure may cause this DTC to set. Refer to Fuel System Diagnosis .Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Intermittent Conditions .

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Down to the final OB code on my truck...Po174

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- Ignition misfiring
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- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem.

It's a very common problem for the Ford Windstar. Here a link to a web site with information how to repair:
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1 Answer

Have trouble code po171 on my 2000 chevy venture, looking for possible solutions


P0171 indicates the computer has detected a "lean engine condition". Sorry to say you couldn't have gotten a worse code. By that I mean there are sooo many things that can cause a P0171
However I'll just run down a few of the more common causes:

1 - Look for any obvious vacuum leaks around the engine area. Vacuum leaks will definetley
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Especially check around the PCV system and where the EGR valve mounts to the intake.

2 - Check your oxygen sensor wiring to make sure it is not chaffed and shorted. This will force a
lean condition and set P0171. O2 sensors are located on your exhaust system pipes and



3 - A constant or intermittent engine miss will trigger this code. Check for fouled or shorted
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4 - Low fuel pressure will also trigger P0171. Check your fuel pressure if thats possibe. If it's low,
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Try these tips first.If not successful, we'll take it 1 step further. Good luck!


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