2000 ford explorer mass air flow sensor problems

More likely is a problem with your crank case vent or oiling a reusable air filter too much.įor the crank case vent, pull your air filter box apart and remove the engine air filter. Blow-by can happen, but you'd have to have another issue to cause it.

MAFs can become contaminated only a few ways. I have a bottle of it in my toolbox at all times. These are the same symptoms that replacing the MAF sensor corrected on my previous Focus (which gave the same Manufacturer Control Fuel Air Metering and System Too Lean codes), so it's just an educated guess. It wasn't until the Manufacturer Control Fuel Air Metering code started showing up intermittently that the vehicle began idling too high, and faltering and stalling at stop lights. I understand that at least one of those is pertaining to the EGR valve/sensors, and I'm open to any suggestions about fixing it, but those codes have been on for a long while with no discernible loss in performance.

The two that are normally on are P0401 EGR Flow Insufficient, and P0171 System Too Lean (Bank 1). Can't get the exact code right now as it's not displaying. How should I go about doing that? Since I was planning to replace it in the first place, I guess it's worth a try.Īnd yes, the reason I am asked about K&N is because of the possibility of oil getting on the sensor.Īs for the codes, there is one that is there about half the time I check, and that is 'Manufacturer Control Fuel Air Metering'.

2000 ford explorer mass air flow sensor problems