Was the vehicle moving for this engine speed sensor code
Or the vehicle was stationary
If stationary IGNORE , ITS not a fault, just how the software reads the code
Clip will read this , and show it in Blue, instead of black writing
If all 4 faulty, engine would not start, so it aint that
You will struggle to get it run on two
The multiple fault code is where there is either a cam sensor fault, or fuel system fault
If p0313, was the fault code check fuel filter
now Usually with a Cam sensor fault is given even though its not a cam sensor itself thats at fault
You get
The cylinder the fault started at , say p0301 ,( thats cylinder 1 fault code, but could be for any of the cylinders, so the 1, would be a different number for the cylinder the fault was started from, ( this is what actually triggers the cam sensor fault,) then the multiple misfire fault , then the cam sensor fault , but the cam sensor will show in the fault code list ( Unless some tart has cleared the faults once, or disconnected the battery, then that fault will 99.9% lost )
So unless Cam sensor is in the list
Not going to be that for multiple misfire fault is detected, if it was 1 complete coil pack, then you could say multiple misfire code is coil pack
Multiple misfire detected can be caused through head gasket failure , ( But usually on the Vauxhall range) not come across a head gasket fault on a Renault for over 20 years, but will be signs other than water in the oil, you would use water on a Renault engine
So can cross that off the list
ECU its deffo not because you would also get an internal fault code related to the ecu as well as the fault code, and that code would come first
AND there are lots to say what part of the ecu has failed
So we have a few reasons for the multiple misfire faults
Now its upto you to work out which one of the issues you have, if other associated fault codes are also involved
adding these together, and then using this, to work out what is the actual fault
Now you understand why us on here ask what seem to be stupid questions at times
We are trying to find the missing info off you that you have not thought off, but we know its part of the whole picture