Been getting both &either current or pending for some time, cleaned MAF then replaced it. Used a bottle of Techtron.


Monitoring MAF flow, short and long term fuel trim and leading O2 sensor for both banks. Not seeing anything unusual.


DTC says set by out of range fuel trim but not seeing that, short and long term values are close and getting over 20mpg. Plenty of power.


Any suggestions ? Would expect manifold leak to show up as O2 value and fuel trim request but nada. Ran about 150 miles yesterday and didn't appear until in stop and go traffic Idles smoothly at 600 rpm light on or off.