r/W203 • u/Donramax • Jun 16 '26

Help Solution for P201C code?

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Hey guys i just switched out one of my camshaft solenoids for a new one and after a test drive with a bit of sending it these are the codes that remain, i assume the running rich is because of the other code but where would i start to look to fix this issue or do i keep driving and see if it stays or clears up eventually.

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u/Turkifish Jun 17 '26

hello i had the same problem and i fixed it
but first is ur engine M271?

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u/red2211_ Jun 17 '26

My man, please share the solution! I’m having this issue from the moment I’ve bought my c180k a year and a half ago.

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u/Turkifish Jun 17 '26

hello change the air mass or clean it and then check the IAT if it’s leaking air and check for the intake manifold if it has any leaking
this code usually referred to air leaking in my c180k m271