hello

I have this doblo in it will only run for a couple of seconds then cut out the only fault code is the p0521 oil viscosity/pressure switch range performance which wont clear have scoped voltage at the switch which is 0volts when key on eng off then 10volt when running.the dash sais antipollution fault filter clogged but scanner and live data filter is ok/ normal. i am going to check oil pressure with gauge and then change oil. has anyone had previous experience of this.