10 Error Codes together
I have a 2008 Mercedes E300. Now the check engine light is on and I checked the codes, there are 10 of them:

poo54 p0056 p0060 p0036 p0136 p2235 p2a00 p2272 p2270 p0156
Could anyone help me on what I should do?
Thanks
Sorry I don't know the engine model, it is a 3L gasoline engine, car is 4matic.
I think they are active codes(not pending).
I will try to tell my story as precise as I can. The check engine light went on about a month ago, I checked the code, there were 2 of them, p0056 and p0060, both about Ho2s sensor(bank 2 , sensor 2), I cleared them. The next day the CEL light on again, I waited about 10 days to check the codes, that was the time I saw all 10 codes. I cleared them again. The next day CEL lights on, P0054, p0056, three or four codes.
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But now, 2 of the codes are back, p0056 and p2270. I noticed the problem all happened when there was extreme cold weather (-20c).
This shop is the shop has most people recommended on internet. And they used the computer to connect to my car and checked the system, at least that was what they told me.
Any comments?
Last edited by foldhero; Mar 10, 2016 at 01:26 PM.




