I cleanup and I drove from WI (76MPH) to South Dakota (82 MPH) on Monday March 15, 2019 and I am getting a silent code where the engine idiot light does not come on and when I check the code is still there. It maybe the ECU maintains previous codes. Not sure. My MPH increased from 18 MPH to 24...
I did clean up EGR Tube and installed a new MAP and the light did go off. I still have issues related to P0401 from my Bosch 1200 to include:
1.Fuel system Mon (INC)
2. NMHC Cat Mon (DIS)
3. Exhst Gas Sensr (INC)
4PM Filter mon (Inc)
I am assuming the INC is incomplete not sure on the DIS
Receiving same two codes (p0401 and P1296 and I cleared them with a cheap Walmart OBDII/EOBD). I did purchase a new MAP sensor and I will clean things up this week end, like the EGR Diffuser and install new MAP sensor