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mnvaughn · 01-31-2016, 12:52 AM

Over a month ago I went ahead and cleaned my CAI intake and also re-oiled it. Within a few days of this the car started throwing two codes, P0171 and P0174, which is system too lean in bank 1 and 2. My first thought was that I must have put too much oil and that MAF sensor was now dirty. I bought MAF sensor cleaner, disconnected the battery and cleaned the MAF sensor. The code went away and I thought I fixed the problem. However a few days later both codes reappeared. Cleaned it again, codes went away and again reappeared a few hours later. Both of these codes come and go with them disappearing if I don't drive the car for a day or two and then reappearing after 3-4 days of driving. Does my tune and fuel mapping causing this issue because now my filter is cleaner? Or does it sound like a faulty MAF? Any help or suggestions would be appreciated.

01-31-2016, 12:52 AM	#1
mnvaughn Drives: Camaro Join Date: Dec 2013 Location: United States Posts: 65	ZL1 throwing codes Over a month ago I went ahead and cleaned my CAI intake and also re-oiled it. Within a few days of this the car started throwing two codes, P0171 and P0174, which is system too lean in bank 1 and 2. My first thought was that I must have put too much oil and that MAF sensor was now dirty. I bought MAF sensor cleaner, disconnected the battery and cleaned the MAF sensor. The code went away and I thought I fixed the problem. However a few days later both codes reappeared. Cleaned it again, codes went away and again reappeared a few hours later. Both of these codes come and go with them disappearing if I don't drive the car for a day or two and then reappearing after 3-4 days of driving. Does my tune and fuel mapping causing this issue because now my filter is cleaner? Or does it sound like a faulty MAF? Any help or suggestions would be appreciated.