1999 Ford Explorer

So far so good cleaning the maf sensor seemed to work. After removing the neg batt cable and cleaning the maf sensor with maf sensor cleaner. Once finished replaced maf and put neg back on batt, started the car and the light went out. Last time it was out for 2 weeks after changing out O2 sensors maybe this will do it for good this time.

Thanks carpro's I will be using you guys again if needed!

Hello again ok this time it came on when it was really cold, the code was for lean bank 2 this time so now im wondering is it the egr pressure sensor regulator or egr valve itself im slowly rebuilding this system I think but hey if it works ill do it where would you start

thanks in advance
Jon C

The code this time is P0174 System too Lean (Bank 2), It has been less than a month since replacing both the upstream and downstream O2 Sensors when the original codes were as folllows, P0171 System too Lean (Bank 1) and P0174 System too Lean (Bank 2) about 2 weeks went by and on a cold morning the same 2 codes came up, This is when I wrote you guys and cleaned the MAF sensor by your suggestion and it worked, all was well for another week and again on a very cold morning this time it only gave the code P0174 System too Lean (Bank 2) so this is where were at now

Ok, I have checked the vacuum lines with the engine running spraying each of them with throttle body cleaner and the idle stays the same so the vacuum lines are ok. I have not cleaned or replaced the egr system yet, neither have I cleaned the pcv valve I will do that in the morning when I get to work first thing. Air filter is new just replaced and the oil level is ok where it is supposed to be on the dipstick. Have not touched the fuel filter but have used injector cleaner about every 3rd tank of gas which increased my mileage. And yes I do have a digital multimeter. And just to update the light has been off now for 3 days after resetting it.

Thanks again
Jon C