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4CA0 Oil Pressure Switch, Plausibility

Destroyer-Dan
in BMW 3 Series Forum

Featured Replies

So today I changed the fuel filter on my car as I thought the car sounded as if the injectors are starved on acceleration/under load the car runs a lot smoother and sounds a lot quieter it was overdue the fuel filter change … after I decided to scan my car with ISTA as I always do it’s a habit of mine I have a new error code 

4CA0 Oil pressure switch, plausibility 

my question is does this sensor control the oil pressure or does it just read the oil pressure and send it back to the DDE I have no warning lights on the dash I had cleared the fault and rescanned the car the fault didn’t return until I next took the car for a drive is it just a simple case of replacing the oil sensor when I can be bothered or shall I stop driving the car until it’s replaced cheers 

 

  • Quote

    Morning Dan

    The oil pressure switch is on the Oil Filter housing and normally pretty much trouble free, the Thermal Oil level sensor in the sump is often a PITA 

    The oil pressure switch/sensor could have been triggered by low voltage 

    The fuel filter is often "forgotten/ignored" at service even by Main Dealers so good spot.

    Dave

  • Quote
    • 5 months later...
    On 10/11/2021 at 6:22 PM, Destroyer-Dan said:

    So today I changed the fuel filter on my car as I thought the car sounded as if the injectors are starved on acceleration/under load the car runs a lot smoother and sounds a lot quieter it was overdue the fuel filter change … after I decided to scan my car with ISTA as I always do it’s a habit of mine I have a new error code 

    4CA0 Oil pressure switch, plausibility 

    my question is does this sensor control the oil pressure or does it just read the oil pressure and send it back to the DDE I have no warning lights on the dash I had cleared the fault and rescanned the car the fault didn’t return until I next took the car for a drive is it just a simple case of replacing the oil sensor when I can be bothered or shall I stop driving the car until it’s replaced cheers 

     

    Did you ever got it sorted?

  • Quote
    • Author
    On 3/28/2022 at 8:29 PM, Georgegsg said:

    Did you ever got it sorted?

    Hi mate I cleared the fault code and it seems to off stayed away not sure why it appeared to be honest I did a oil change before I cleared the fault as well .... its only came back 1 time since i will change the sensor soon though 

  • Quote
    • Author
    On 3/28/2022 at 8:29 PM, Georgegsg said:

    Did you ever got it sorted?

    I will be changing the oil again in the near future and I will replace the sensor and get back to you 

  • Quote

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