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Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
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2003 mercedes c180 kompressor fault code P201C car has eractic

Resolved Question:

2003 mercedes c180 kompressor fault code P201C
car has eractic idle and sounds rough when ticking over
Submitted: 7 years ago.
Category: Mercedes
Expert:  Stan replied 7 years ago.


The P201C meaning is Misfire on cylinder 1. So please inspect the spark plugs, and replace the if necessary. Also switch the ignition coils around and check if the problem moves with the coil. If this does not help, i suggest to switch the injectors.




Customer: replied 7 years ago.

Hi Stan,


Found a new mechanic last night and he agreed with your diagnosis but aslo said it could be the fuel pump?




Expert:  Stan replied 7 years ago.

Hi Mark,

Usually in the case fuel pump failure, misfire is present at several if not all cylinders. If the idle is bad due to fuel pump, then there should be no power from the engine during acceleration. But the fuel pressure test with fuel filter replacement is definately a good idea.



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