Scotty, My automatic,2006 Tundra, 4.7 V8 has 174k miles on it. I was getting p0172 & p0175 codes for running too rich. I replaced the maf sensor and started getting codes p0171 & p0174 for running too lean. I read you have to disconnect the battery for five minutes to reset the computer. I thought it worked but about once a week the p0171 & p0174 codes come back. The truck seems too be running fine, what do you think. Thanks
Well the problem is the computer start to compensate when they see a problem. So if they think it's too rich then they lean it out and if they lean it out too much then they got to go to the opposite direction. Then it will flag those stupid codes. There are theoretically a whole bunch of things that can do that. So if it runs okay I would leave it alone until the start to have a problem and then the problem would be so big would be easy to pinpoint
