2000 e46 323ci SES light on but INPA shows no stored faults

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  1. 2000 e46 323ci SES light on but INPA shows no stored faults 
    #1
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    kosti's Car Details
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    I have a question noone was able to answer so far.

    Since a bough the car three months ago, i was trying to get it back to shape which included getting the SES light off. It only comes on with the key in position 2 and goes off as soon as the engine is started.

    Having hooked the car up on INPA, it showed two fault codes stored in error memory - one concerning the heated thermostat and one the exhaust cam sensor. Now i have changed the thermostat and today, i changed the exhaust cam sensor (which,BTW, is ridiculously expensive for the little thing it is) believing id get rid of the SES light.

    After clearing the error memory, turning the car on and off, the codes dod not come back - not even after driving the car around. So i beleive the thermostat and exhaust cam problems are solved. The problem is, the SES light still comes on and wont turn off unless I start the engine.

    I checked the error memories of other modules in the car, there are no other faults stored anywhere (tranny, ASC, airbag, ...).

    What do I do to get the SES to go off?

    One thing i can think of that could cause the liht to stay on are the faults stored in the thing INPA calls the Shadow Memory - what is that memory good for? I cant seem to be able to erase it and the faults stored make little sense as some of them are related to faults in components my car doesnt have (like the secondary air system) These are the codes from the shadow memory.

    So again - what do I do?

    133 - SIgnal CAn ASC 3
    52 - activate solenoid valve exhaust flap
    35 - activate relay secondary air pump
    62 - activate solenoind valve seconday air
    126 - activate solenoid valve tank leak diagnostic pump
    127 - actiavte solenoid valve sucking jet pump
    50 - activate solenoid valve fuel circulation switch

    all these faults have a frequency of 0 and are described as not present at tne moment.

    Besides the light being on, the car runs perfectly, no idle problems, no power loss no nothing.

    Help?
     
     

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    #2
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    TheEnd's Car Details
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    Which one is SES light?

    It might be a bulb test, it will light up, to show it works before switching off again?
     
     

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    #3
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    The Service Engine Soon light, or, as some may call it, the Check Engine light. Yes, the bulbs are tested before starting the engine, but all of them (EML, airbag, oil, ...) go off after a few seconds only the SES light stays on. It does turns off after the engine is started, though-
     
     

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    OK.
    Could it be pointing to a service or coolant change being needed?

    These won't show on INPA as a fault, and you may still have green lights for service, but it might need the annual service, which is brake fluid and coolant.
     
     

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    Unlikely. The INSPECTION and OIL SERVICE intervals wont be due for quite a bit and Im not aware that there is a coolant change interval set or monitored. I might reset both intervals but I personally dont see this being a likely source for the light not switching off.

    Perhaps the faults stored in the shadow memory (whatever it is) are the culprit and I would really like to hear some opinipns on how to clear them, if that is at all possible.
     
     

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    From memory I don't think you can clear the shadow memory. Pretty sure it's not important.

    If you connect to the instrument cluster can it be reset in there?

    Ian
     
     

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    #7
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    Im a little confused now. Some people told me today that the SES light is not supposed to turn off like the rest of the lights with the key in position 2 and is only supposed to turn off when the engine is started - pretty much as I have it now. If that is in fact the way the light works (only indicating a problem when on with engine on) how come I had two fault codes stored (rather serious, for that matter) and the light did not light up when I was driving? Now Im confused.

    Soo..what is this shadow memory good for, anyway, if it cannot be cleared and the codes stored in it make no sense?
     
     

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    #8
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    Inpa was an internal BMW development tool so was not really designed for home use. Its more for engineers to run test scripts.

    I have never seen shadow memory in another tool so just ignore it. The errors I've seen in there have never related to a problem I've had with a car.

    If the SES light is anything like the E36 service indicator it will not illuminate when you have problems, the only light that would is the EML light.

    Ian
     
     

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