Hello everybody, I have 2011 C180 CGI with M271 engine from several months. When I bought it I replaced timing chain, tensioner, camshaft sprockets together with valves, oil and oil filter with oil filter box.
Last moth occasionally when the engine is in working temperature and the car is in idle in jam, engine start rattling as diesel for some moments. When I connected the diagnostic device the DTC is P001762 - "The position of the exhaust camshaft (cylinder bank 1) is implausible relative to position of the crankshaft. The signal comparison is faulty". After some time the second DTC appears P001477 - "The position of the exhaust camshaft (cylinder bank 1) deviates from the specified value, The commanded position cannot be reached." But the engine is running well and there is no strange noise. Replaced the camshaft position sensor - same result. At the weekend will open the engine cover in order to check visually the camshafts adjustment. the crankshaft sensor is not replaced, also and electromagnets, driving the timing change valves. Could you give some advice, how to proceed.
Thanks!

 

Did you find the problem? Because i have same one

 

I think yes, but this is more complicated. The problem was that there was a fuel in the oil and then its viscosity decreases. As you know this engine is with variable valve timing, which is controlled with the oil. You have to go to the dealer and have to change the engine firmware. They have an update and for cause of changing is written “fuel in oil”. Also check the crankcase ventilation valve which is located under the intake manifold, mine was clogged.
If you want i can send you pictures with firmware versions before and after changing, because i have a Foxwell scanner.
After making of these things, replace the oil, using 5W40.