So I thought I would check some of the parameters on my Multiecuscan and try and work out what the faults are.
The car drives fine (apart from the worn bushes which are getting sorted this week) but I keep getting a few codes up:
P0380 - Board relay, thermostarter or preheat. ECU.
P0404 - EGR
P0190 - Diesel pressure sensor (this one is putting the glow plug light up on the dash for about 7 secs)
I have checked and cleaned the connection on the Diesel pressure sensor, removed and cleaned all parts of the EGR and the MAP sensor.
The fuel pressure is between 313 and 315 bar and the desired is showing as 311.9.
The boost pressure is showing as 1041 mBar and desired shows as 1016 mBar.
It idles at around 800rpm.
Intake air quantity is 458.9 mg/i.
Desired intake air quantity is showing 263.0mg/i.
These faults will clear (except the fuel pressure which will clear after a few times with engine running) but all return the next day. I can however turn the engine off and reconnect the Multiecuscan and it is all clear still. I drive 6 miles to work and back at town and back road speeds then they seem to return.
Any help on this is really appreciated. I am happy that it runs fine and seems powerful enough but it bothers me that these codes keep appearing. I am clearing them with the free version of the Multiecuscan, in case this is important.