Both air filters are new and properly seated. Cleaned first MAF sensor several times but codes kept coming back so replaced with new Bosch MAF. Codes now take a day or two to appear but keep coming back.


Short Term Fuel trim is normally in the +2.0 to +3.0 range but have seen jump momentarily -8.0 to -10.0 for less than a second (both banks). Have not seen an accompanying change in either O2 sensors or MAF flow reading. Coolant temps is stable and correct. Not sure what else to monitor but something is making the trims jump occasionally.