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Toyota Repair/Error codes P0171p and P1130p


On my 1999 Toyota Camry 4Cyl with 150k miles just got an engine light. Used code reader got P0171p and P0171p codes. All seems well with car, runs great just concerns regarding engine light.

Hello, a common reason for this code is the mass airflow sensor (MAF), it's located in the large intake pipe coming from the air filter housing, it can be cleaned with good results, just remove the two Phillips screws and the electrical connector and spray the inside of the opening of the sensor using an electronic parts cleaner (available at he autoparts store) or a specific MAF cleaner, let it dry, disconnect the negative battery for about a minute and go drive it for about 15 minutes, hopefully the light will stay off.

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Ted Ritter


I have more than 28 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 am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for more ten years an have answered over 16,000 questions helping Toyota owners with their problems and save thousands of dollars without any compensation, some of my answers are published on many other websites including google and various automotive forums. DONATIONS ARE VERY MUCH APPRECIATED, IF YOU HAVE RECIEVED HELPFUL INFORMATION PLEASE MAKE A DONATION. AS OF TODAY (JULY 22, 2014) ALL REQUESTED GRAPHICS, ILLUSTRATIONS, DIAGRAMS, PHOTOS, WILL REQUIRE THE MINUMUM DONATION UP FRONT.


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