SOURCE: Toyota Avalon XLS, yr 2000, engine lights on
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.
SOURCE: I have a 2000 toyota avlon and the check engine
p1130 refers to af ratio senor bankone sensor on. If you car has a six cylinder bank one is the side where #1 cylinder is located sensor one is the sensor closest to the engine. hope this helps
SOURCE: check engine code #P1130
air fuel sensor bank 1 sensor 1-ur air-fuel sensor bad connections or is failing
SOURCE: I have a 2000 Camry - 6 cylinder with about
Was the computer reset after the thermostat was replaced?? If not, it must be reset to clear prior codes. as for the p1130/1135, they are related here is some info>>>>http://www.engine-light-help.com/toyota-engine-light.html
SOURCE: Air/flow senor #1 bank made the check engine light
P1130 = Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1).
Chances
are the upstream sensor (similar to an O2 Sensor but not compatible) is
shot. However, before condemning the sensor, check the circuit (wiring,
connector, etc.) for power, ground, etc. If you can, check fuel trims
as well.
If it is the sensor, take your VIN# to the dealership
for an exact replacement. Be advised...they don't give 'em away.
Good
luck and keep us posted.
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