I have the code P2248 now showing on my 2008 E280 CDI sport, when looking up the code it shows it as "o2 sensor reference voltage performance" bank 2 sensor 1.
I have been suffering some horrendous fuel economy recently and have had the codes read but nothing showed up until today and this...
After some advice before heading to garage really.
Engine fault light came on and off a few times over the the last couple of weeks (incidently few days after an A service). Invested in a Bluetooth OBD2 reader and using Android Power Torque Pro, I have read the fault code to be P0670 Power...