My VZ V6 was giving the service vehicle soon message which when we checked the codes was pointing to the oil pressure sensor being faulty. Replaced the oil pressure sensor and the warning message went away.

Thought all was good for about a month then it was back.

Changed the oil because it looked dirty and was due for a change by time but not distance. That appeared to help but sure enough SVS came up again.

Codes logged are:
U0155: - Lost communication with instrument panel cluster control module.
P0523: - Oil pressure Sending Unit Voltage too high.
P0521: - Oil pressure Sensor Performance.

Any ideas ??? Another faulty oil pressure sensor ??? Some people are saying dash cluster problem ???