Hi All, I am new in this forum. I have a 2000 ES300, and it gives me a code of P0171. I take the car to a repair shop, and they clean the maf and clear the code. I drove the car for a few miles until the engine reach to the normal operating tempertaure, then the cel is on again. The engine runs fine unitl it reach to the normal operating temp. any advice will be appreciate.

Thank you in advance.
xintol

 

Read this page, I found it by googling your trouble code.

http://www.obd-codes.com/p0171

It means that there is too much air for the amount of fuel that your engine is using.