Question about 2000 Toyota Avalon

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Toyota Avalon XLS, yr 2000, engine lights on

I went to autoparts, and they gave me these two codes for the "check engine" lights(these lights went off last night)

Codes:
P1130
P0171

These dont make any sense to me. Can you help me out on this one?
I am ashwini1081@yahoo.com

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  • Anonymous Sep 07, 2008

    code po440 evap emission control system malfunction on 2000 avalon xls what is

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  • Toyota Master
  • 1,861 Answers

P0171 is a lean code. Open the hood, and locate the mass air flow sensor. Small black thingy in the intake tube between the air filter box and the engine, held in with 2 small screws. Remove the connector, remove the screws, and remove the sensor. Look into the sensor, you are going to see a couple of wires deep inside it. They will probabaly be "fuzzy" looking. Spray some brake cleaner on the wires until they are nice & clean. This will cure the P0171 code. Then check the air filter; replace it if it is dirty.

P1130 is an air-fuel sensor code, bank one, sensor one. More often than not, when we see this code, we replace the air-fuel sensor. Buy the replacement from you Toyota dealer, because the aftermarket sensors will not send the proper signal to the ECU, and you will be upset for having to buy a second sensor.

P0440 is a leak in the evaporative side of the fuel system; this looks after the fumes of the fuel in the tank. There are several reasons for seeing a P0440, like leaking vacuum lines, faulty fuel cap, rusty fuel filler tube at the cap, etc. This is kind of difficult to rectify without the proper equipment needed to diagnose what & where the actual leak is.
Hope this helps, please consider kind remarks regarding this solution. Thanks.

Posted on Sep 16, 2008

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