Volvo EGR help!

[Full Function]

The oil in the ECM connector plug is an issue, you might want to unplug your oil level sensor connector and check to see if the pins are hollow or solid. If they are hollow which I'm guessing they might be, I would recommend getting an updated oil level sensor harness wire splice kit. This will convert your hollow pins to solid and eliminate oil going to the ECM. On you're MID 128 SID 146 FMI 3 code, make sure the ECM connector (the lower one) pin isn't spread out and makes proper contact. The EGR valve connector is in rear of the engine where the valve cover sits (hard to get to). Do a quick visual in the rear to make sure the wiring isn't damaged anywhere. Unplug the wiring connector and do an ohm check from the ECU connector to the EGR valve connector. If you have an issue in the wiring harness, I would recommend you getting an engine harness which has the updated oil level sensor connector as mentioned previously.