2012 Mbz C250
Vehicle came in for a smog catalyst monitor o2 monitors and fuel monitors had not run. We drove it for 50 plus miles and cat monitor 02 monitors run but the fuel monitor did not. we drove it some more and it set code p0002-77 for high pressure fuel pump. car has only 14 000 miles the fuel pump was replace. no codes have return but fuel monitor has not run. Did not find a specific drive cycle for this monitor other the just idle for 3 minutes. does anyone know how to run the fuel monitor?
Max, it doesn't really matter how to run the fuel monitor. If that fault is coming back, the fuel monitor will never complete. Repair the fault code and I'm sure the monitor will reset. Maybe fuel pressure sensor. All monitors will reset after all fault codes are addressed.