Help Please - Interpretation of Merc Fault Code

[Zulu 10]

The initial message was deleted from this topic on 28 February 2021 at 11:56

[Stegel]

Hi,

I can't give you any specific advice, but what are you using to read the codes? I have an Autel OBD reader (cheap and cheerful) and anything that pops up on my CLS or my wife's E class (both V6 diesels) has a letter and four numeral code - e.g. P0130 for an oxygen sensor - and Googling that normally brings lots of advice.

Steve

[cptsideways]

You most probably have a duff thermostat & the engine is always cold, or faulty temp sender or both, this makes them run in rich mode that fluffs the o2 sensors

[DanNZ]

I appreciate this post is a few years old... I have the exact same fault code (2668), along with 2553 on my R350CDI. It seems to be a little heavier on diesel than usual and there is perhaps a slight turbo lag, although I might be imagining this!

Did you get to the bottom of what was causing the fault on your car?