P0171 OBD CODE

[ltrujil]

-2000 AVALON

-P0171 CODE FROM SCAN TOOL

I HAVE BEEN TO A COUPLE OF WEBSITES AND IT SEEMS TO BE A DEFFECT ON THESE CARS.

MOST OF THEM HOWEVER POINTED THE CODE TO THE MAF SENSOR, WHICH IS NOT A CHEAP PART (I don't think there's any cheap toy parts).

CAN SOMEONE ADVICE ON WHAT ELSE IT COULD BE or IS THIS THE PROBLEM 99% OF THE TIME?

[humanoid]

Well, according to the link below, your engine is running lean. If it indeed is your MAF you may want to clean it. and reset the computer and see if the code returns. Do you have a "cold" air intake system? If you do, or if you did, the oil from the filter may have gunked up the MAF sensor. Just remove the MAF sensor and spray it down with electrical contact cleaner that you can get at any auto parts store. Make sure the can says it's safe for plastics or else you'll have to replace the sensor. Spray it down, but don't use a q-tip to clean the little wires. Those things are very sensitive. You break those and you can say goodbye to a few hundred Benjamins. After you've sprayed it liberally, let dry thoroughly and slap it back on and you should be good to go. Hope this all helps and let us know what the outcome was.

http://www.yotatech.com/~corey/tech/dr_z_obd/dr_z.htm

Forgot to add... to reset the computer, you can either find the big square looking EFI fuse (in the fuse box). Pull it and leave it off for a few minutes and replace it and start the car. That should clear it up. If not you can pull the negative terminal on the battery to reset it too.

[stevelaw]

You know what? He ought to go ahead and clean his intake while he's at it.