[eugene89us]

Can someone with N47 or N57 with a scantool please graph EGR Actual vs Commander with percent error? I am using the app called Car Scanner with BT OBDII. My EGR Actual is always about 10% higher. I don't know what my original EGR did before it threw a code and was replaced, but this one seems to have EGR percent error anywhere from 20% up to 99%. I noticed that when EGR is at 99% error, the car runs rough. So either EGR replacement is defective or some component responsible for EGR is on its way out.

[eugene89us]

These uploaded images have terrible quality.

Red line is Commander EGR Duty (at reporting time is 7%), Green line is Actual EGR (15%). Blue line represents EGR Error (99%).

[capt_slow]

Here's mine. Taken from a cold start after car was sitting in my garage for 2 days. I started logging about 2-3 mins after I started the car, so excuse the lapse in data. Error hovers around 35-40%, after I revved the engine to around 3k RPM, it stabilized and never hit 40% error again. About 7 mins was captured in the chart.



Side note, I didnt realize VCDS had generic OBDII features!