Superb mk 3 EGR engine management Light

Good morning all,

Been having a look online for information on the error codes I am getting with OBD Eleven. Are there any output tests on the EGR I can run with OBD Eleven?

I have seen online that removing the EGR is a bit of a pain. I am wondering if I could clean it in situ with and EGR cleaning spray. I have seen ones that you spray in the air intake. Do these actually work? Obviously they won't work as good as removing and manually cleaning. But if it is just a sensor with a bit of carbon on it, it might clean it off.

If anyone can expand on what the error codes below mean that would be great.

The car seems to run ok and there are no strange noises or rough engine running.

Thanks

David

---------------------------------------------------------------
01 Engine

    System description: R4 2.0l TDI
    Software number: 04L906026ES
    Software version: 1989
    Hardware number: 04L907309R
    Hardware version: H23
    ODX name: EV_ECM20TDI01104L906026ES
    ODX version: 002002
    Long coding: 01190032034501087000

    Trouble codes:
        P046C00 - EGR Sensor "A" Circuit Range/Performance
            Intermittent
                Date: 2022-07-07 16:03:22
                Mileage: 135710 km
                Priority: 2
                Malfunction frequency counter: 66
                Unlearning counter: 255
                Engine speed: 1191.50 1/min
                Normed load value: 0.0 %
                Vehicle speed: 45 km/h
                Coolant temperature: 87 °C
                Intake air temperature: 64 °C
                Ambient air pressure: 1000 mbar
                Voltage terminal 30: 14.420 V
                Dynamic environmental data: 209628102614CA10C2000017F500001331040711ED0702021211A90588
        P040500 - EGR Sensor "A" Circuit Low
            Intermittent
                Date: 2022-07-07 06:26:56
                Mileage: 135677 km
                Priority: 2
                Malfunction frequency counter: 254
                Unlearning counter: 255
                Engine speed: 1262.00 1/min
                Normed load value: 66.3 %
                Vehicle speed: 3 km/h
                Coolant temperature: 88 °C
                Intake air temperature: 66 °C
                Ambient air pressure: 1000 mbar
                Voltage terminal 30: 14.340 V
                Dynamic environmental data: 2096281026130310C2000017F500001331009311ED0702021011A90249
        P164E00 - Oil pressure regulation valve Electrical error
            static
                Date: 2022-07-06 16:05:27
                Mileage: 135663 km
                Priority: 2
                Malfunction frequency counter: 3
                Unlearning counter: 255
                Engine speed: 0.00 1/min
                Normed load value: 0.0 %
                Vehicle speed: 0 km/h
                Coolant temperature: 99 °C
                Intake air temperature: 87 °C
                Ambient air pressure: 990 mbar
                Voltage terminal 30: 12.100 V
                Dynamic environmental data: 209628111A000011BE0E82176E0011BC3A9C16250B5A162D0C1F