P201C and P1072 fault code 2005 Mercedes Benz C230 W203 M271 engine

Question

Hi I have a P201C fault code:P201C Self adaptation of mixture formation, The mixture is too rich in the part load range [P0172] What is the cause of this error.

The AMF + Intake Air Tempreature + the following Breather Hose have been changed:
lower hose A 271 018 14 82
valve A 271 018 00 29
upper hose A 271 018 12 82

Only the following

hose A 271 018 15 82 $2.21

has not been changed

Answer 1

P201C Erratic idle

P0172 Mixture is too rich in part-load range

I don't have a listing on this part number, that or I have a different vent hose, there is a TSB for this condition P0172 for the MBZ which is DTC P2029 / P2046, TSB # P-B-07.08/33. This is for the partial load hose crankcase connection fitting and replacing the front 02 sensor.

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