Hello all,

I'm receiving codes 1884,P0102,P0174,P1171 and P1174 which I believe would point one to the MAF sensor first.

The questions is how can you verify the sensor is confirmed 100% defective and not a air leak/exhaust leak that is tripping things up?

I'm able to see the MAF Airflow and Air Temp using my scan tool which is producing values at various RPM's,so its functioning. Does anyone know what values you should be seeing on the airflow at various RPM's?

I got rid of my 03' Disco so I don't have a car to compare against anymore.

 

If you have a leak, I'm not sure these will help determine leak or bad MAF since they would likely be different. But, here are some readings from my '03 4.6 ltr.

 

I know a lot of the Australian guys use nanocom to capture a CSV file of multiple sensor outputs, and then plot or graph them with excel or the like to troubleshoot MAF and other things. This is usually on TD5. I'm not sure if V8 has that same capability. I'll have to load an SD card in mine and try it at some point.