From: crwlr@verizon.net   
      
   If your truck has the 4-cyl., it only has Bank 1, and this makes sense that   
   the MAF could be the trouble. Another thing that can make a lean is a vac   
   leak and an errant O2 Sensor. Cleaning and looking for the leak are the   
   proper approaches. Spending money on a sensor is the wrong approach. RayO   
   has a test procedure to check the sensor output if it comes to the O2 Sensor   
   as the fault.   
      
   If you have a V6, I'd expect the MAF to contribute to a lean in Bank 1 and   
   Bank 2, which would discount it as part of your problem -- you did not   
   report a lean condition in Bank 2.   
      
      
      
      
   "Scott"  wrote in message   
   news:plfHj.205$6%2.48@newsfe06.lga...   
   > Hey,   
   >   
   > I made it by Advance today when it came on and the code P0171 came up with   
   > something about lean in bank one, I think. The code was definitely P0171   
   > and he said it could be the Maf sensor was bad or just dirty, so I bought   
   > some cleaner for that and it was dirty. So now I'll drive it and see if it   
   > comes back on.   
   >   
   > Does anyone have a better interpretation of that code?   
   >   
   > Thanks,   
   >   
   > Scott..   
   >   
      
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