Mercedes W205 Mass Air Flow Fault P228007
Hoping to reach out to some of the Mercedes techs here for some knowledge prior to committing to a strip-down:
Was struggling to set vehicle details in field above so please find below...
Make/Model: Mercedes-Benz/C Class
Engine: 2.1 L
Engine Code: 651921
Got a recurring fault code (see attached) that causes the engine malfunction lamp to active (No limp mode).
P228007 clears but will returns after a number of days (drivability reported to be unaffected by customer). I wonder if there is a discrete air leak or intake issue causing the noted DTC to flag. Anything common or “known issues” on this one that could be the cause?
Some history: vehicle has had a new dpf and pressure sensor fitted for previous hard faults (excessive exhaust pressure and permanent electrical fault in differential pressure sensor - all adaptations reset etc upon renewal - no related faults have returned).
Look forward to all thoughts and replies. Thank you in advance.
hi this engine is a cdid3s2 I think and the codes require dealer tool to carry out a guided test and will most likely need a modified air intake and a change of coding in data card and then a new programming and scn coding of the engine ecu regards kevin
Thanks Kevin, very good of you to reply. Perhaps you may know, is there a technical bulletin released on this issue?
Legend Air filter element with filter screen Further procedure Replace installed air filter element with air filter element with filter screen (part number A … Note A new software version is available and can be installed. When installing a new component 'Air filter' with the part number A …, the SA code 19o must be entered in VeDoc. Programming of the control…
No document but the repair and test is built into dealer tool
Very helpful, thank you Kevin...a very plausible solution to my fault (especially noting use of "mechanical" in the P2280 fault description). I note the the literature you attached pertains to DTC P0101...but assume there will be overlap with P2280?
Yes I think so mercedes do not actually include that code but they are not that precise with the suggestd codes so I would do that first ? If that makes sense
Hi Adam, For one SIR Hardy, is right. May i also add possible air filter soiling or other similar bad condition? Also possibly reset values for MAF and Air Filter. In 90% of the cases i have seen personally, things end up to what Kevin said. Other 10% works fine with resets, or no feedback. Still. Give it a shot IMHO. Cheers.
Great, thank you Paul. Car is booked in with us for later this month. Will let you know how it goes. Thanks again Kevin and Paul - massive help. I’ll run through as much as I can on the software side but won’t be able to SCN code until I’m up and running with my Merc portal account. Cheers fae Scotland :-)