I have a 2000 F150 with the 4.2. I was wondering how often the maf sensor should be replaced. I was going to replace the 02 sensors sometime soon so i thought i might replace it too. Should I replace it while there is one cheap on ebay, or wait till i get an engine code on it? How often should they be replaced or just wait??

Thanks

 

You Shouldn't Have To Ever Replace The Sensor. Only If You Know It's Bad.

 

Just get some qd electronic cleaner at your autoparts store. Then when you clean your air filter clean your maf sensor.