AboutTed Ritter Expertise I have more than 26 years experience as toyota technician, I will be able to answer most questions related to the toyota product line up to the present year models, I specialize in difficult to diagnose problems but when posting a question please keep in mind that some situations require the used of special test equipment and diagnostic procedures especially as the newer models become more technologically advanced, so without actually having the car on hand I may only be able to try to steer you in the right direction and in some cases may have to refer you to the toyota dealer but at least you will know what you may be dealing with. Please don't hesitate to ask any questions, I will have an answer for you in most cases. When posting a question keep in mind that I reside in the US, although I get questions from all over the world I may not have an answer for models that are not sold in the US, I will do a reasonable search to try to match your model to the US model,please refrain from asking about diesel powered vehicles, I have no information for them. In most cases I will not answer questions about major modifications of OEM components, engine swapping or aftermarket products,please post a question not a statement, please provide enough basic information such as year, model, what engine and if anything has already been done to fix the problem, the more information I get the more I can help without having to ask you more questions.
Experience Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician. Certified Hybrid Vehicle technician.
Education/Credentials Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified.
Question I own a 2000 Corolla with 85,000 miles. In the last year it has started to burn oil, about 0.25 quarts every 500 miles. In the last 6 months the engine light has gone on 3 times after highway trips, always showing a P0171 code. I have cleaned the MAF sensor twice; the gasket on the MAF sensor is beginning to get loose. I have also used fuel injector cleaner after these episodes on a near empty tank of gas. I reset the check engine light, everything seems fine, and then the next time the car is on a long highway trip it goes on again. Could you please provide suggestions? Thank you.
Answer Using one quart in 1000 miles is considered normal oil consumption, you are below that. Check for any exhaust or intake air leaks, check for loose or disconnected vacuum hoses and the intake hose connected to the throttle body, if no leaks are found replace the MAF sensor.
