Analog signal manipulation for Automotive

Job ID: 32265480

Budget: €30 – €250 EUR

I have this circuit,
its take signal from one pressure sensor and modify the output by remove signal using an PWM generated from one micro then the output goes out to the original ECU

I have many problems with EMI specially from 20Mhz to 400Mhz with Bulk current test

Can you have any suggestion

Thanks