mrmial
27th February, 2019, 11:56 PM
Hello. I have a problem with the Mercedes CLK W209 2002y 1.8 kompressor 163hp ECU A2711536279 5WK90490. There was a defective lambda sensor in the car, its value remained lean all the time, I replaced it, I cleaned the SD adaptation, the idle mixture adaptations work well, after 5 minutes from the adaptation the values are 0%, while the low and medium load increases to about 20%, after a few km the fault code P0172 "System too rich" is happening, which is strange because according to the corrections, mixture is lean. Lambda Sensor shows at idle ~ 0.89 lambda and while driving from 0.88 to 0.82 lambda. From this it follows that it is actually too rich. Someone ever solved such a problem? I have a few ideas: I will put another lambda sensor in check. The ECU plug was oil, I cleaned everything exactly with the ECU slot, but I suspect that it could damage the ECU. The third option is an incorrect chip tuning, in the attachment I am sending a file that read from the ECU, is anyone able to check if anything in it is not modified? Thank you for your help.