Po171 means the air fuel ratio is lean (not enough fuel) so you must check for anything that can do that a good example would be a vacuum leak that allows non metered air to enter the engine (more air same amount of fuel = lean mixture) or a clogged injector (same amount of air less fuel = lean mixture as well)
SOURCE: 2000 Toyota Corolla P0171
When the fuel trim is high teens or in the 20s then its the MAF that the problem. If fuel trim is normal, 2-5 then its the O2 sensor.
MAF-
Buy "Electrickleen" at the parts store.
Remove the MAF sensor, WHILE COLD, and blast the wire inside with cleaner.
The "hotwire" gets gummed up and changes the resistance of the wire so you get a bad input to the ecu and it trys to lean out for a rich condition that doesnt exsist.When it cant adjust anymore it trips the po171 code.
SOURCE: How do I replace the fuel filter on my 2006 Toyota Corolla?
ITS A LIFETIME FILTER AND WITH REGULAR USE, SHOULD NEVER NEED TO BE REPLACED
SOURCE: need belt schematic for 2006 toyota corolla
I can get you a diagram on monday but it goes from the alternator to the power steering pump then around the tensioner pulley then around the crank pulley then to the a/c compressor then pull on the tensioner to give you some slack and slip it on the waterpump.I hope that helps.Let me know if you still need the diagram
SOURCE: Code P0741 for the diagnostic for Toyota Corolla
This is a torque converter clutch solenoid code internal to the transmission. the computer has detected a fault in the operation of the solenoid. It will need to be diagnosed by a trained technician and may very likely require internal trans repairs.
Testimonial: "Thank you, what is the worse it can happen if I still working as a delivery person>"
SOURCE: what is P2716 code for a 2006 Toyota Corolla mean?
There is currently a recall going on for this problem. You can likely get your money back on the prior repairs as well. See this link http://www.toyota.com/recall/corolla-matrix.html. On the left-hand side, you can click to take you to put in your VIN and see if your vehicle is included. My 2007 vehicle IS included, and I just had the check engine light come on and have been experiencing rough shifting for about 6 months. When the light came on yesterday, it was extremely rough jerky shifting. The light went off today. Took it to Autozone and got same code P2716. Toyota has assigned me a case number, but I won't get a call back until Monday or by close of biz on Tuesday. This problem can cause your car to not start, or to shut down while driving. YIKES! The person I talked to at Toyota acted a little too nonchalant about the whole deal. Telling me to just wait for the call that I will get. She said most dealers would not have the part needed to fix this. According to what I have read. That is the reason why Toyota is not sending out the notification letters to the affected parties until mid-September. Check out all the info and good luck. I am a little bit p.o'd about this right now. - Natalie
Consult
the manual that came with the scan tool to decode.
There is a Toyota TSB for a Computer
malfunction.
There is a campaign for that, take it to your Dealer for repair, should be no
charge
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