Check Engine Lite
 

2001 E320 Sedan 119,000 miles. Check Engine Lite On. The following codes PO173 / PO 170 / PO 130 / PO150. Does this indicate the Mass Air Sensor is Bad? If so when I replace it will the light go off?

Thanks

The codes P0 170/173 most likely mean that you are having a air mass problem.

The other codes are related to O2 sensors.

I took the mass air sensor out and cleaned it with Mass air cleaner. Re installed it and erased the codes from the computer memory. It has been 3 day now and the light is still off. I ran a new test and came up with the following; CCM-complete , Mis Fire Complete , Oxygen Sensor Complete , Fuel System Monitor Complete , Oxygen Sensor HeaterComplete , Catalyst Monitor not complete, EGR not Complete , Secondary Air System not Complete[/color][/b]
No DTCs present. Does this mean my Mas Air Flow Sensor is working? Or has it run through enough cycles to pick up any DTCs?

In my experience the computer adaption cycle seems to be 40 to 50 miles. If you have driven that many miles, likely you are out of the woods. Note, however, that cleaning a MAF is often a temporary fix, and they tend to fail shortly after a cleaning anyway. You might want to start saving up for a new MAF/AMM.