C63s 2015 - P008792 - pressure in system too low
I keep getting error mentioned in the title of the thread.
the car has 120018km.
1. Replaced fuel pump with generic
2. Replaced fuel pump control module
3. swapped pumps out with one from a working car
4. tested high pressure pumps
5. put back original pump with new control module
6. applied tune to check instruction
Fault is intermittent
7. Put back to stock fault intermittent
Does anyone have any ideas (relays and fuses have been check as well.
below are some live data before I swapped the pump out
need to do more logging since I got the car back after above was done.
any help would be appreciated- I’m based in Durban , South Africa
looks like I need 2 injectors maybe 3.
next steps pull the injectors get them all tested or am I tempting fate by messing with the others?
Think it’s worth replacing the knock sensors as well?
Do I need to replace all injector seals?
Last edited by k4inZa; Jun 29, 2025 at 02:15 PM.



