Question about 1991 BMW 3 Series

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Service engine soon light is on - 1991 BMW 3 Series

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  • 7577 Jul 31, 2008

    service engine soon light is lit. gas cap is tight.

  • 7577 Jul 31, 2008

    service engine soon light is lit, gas cap is tight.

  • 7577 Jul 31, 2008

    the car had a major service two months ago.

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Posted on Jan 08, 2009

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When the "service engine soon" light comes on, it's throwing a code. There are numerous codes to features and devices that could be the problem. You will need to get the specific code by having the system read with a diagnostic code reader in order to find the specific problem area.

Posted on Jul 31, 2008

  • Ryan Rogers
    Ryan Rogers Aug 02, 2008

    Did you get the codes?

  • Ryan Rogers
    Ryan Rogers Aug 06, 2008

    Just wondering if you found the problem?

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Hello,
The 'Check Engine' light comes on when there is an emmission problem..It could be as simple as a loose gas cap.,. Or it could be it needs oxygen sensors, catalyic converter, etc. If it went out, don't worry about it, unless it comes back on. If you want to know why it came on, get a "Peake" tester for about $100 - the fault is stored in the computer flash and you can find out. Plus the Peake will reset all computer functions, like service lights, etc...

Thank you!!!...

Posted on Jul 31, 2008

  • Natesan Sabesan
    Natesan Sabesan Jul 31, 2008

    IT could possibly be a P0440 (Evaporative Emission System) small leak/no flow condition..Which can be rectified by hooking up a ODB..Take the car to a service and ask him to Hook up ODB..that should solve your problem..

  • Natesan Sabesan
    Natesan Sabesan Jul 31, 2008

    Yeah fine may be you can take the car to the same mechanic and ask him to rectify it but he might charge you for sure!...Dont worry but your car will surely be back on Track and fine!!.. :)

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This simply means that your service date is near.. This involves

1.) replacing the engine timing belt
2.) changing oil in engine and transmission,
3.) changing filters
4.) serviceing the fuel injection system,,

Basically a tuneup.
After its done, the mechanic will use a autodiagnostic tool to check for any error codes from sensors, investigate and correct the problems if any and then clear all error codes and reset the service counter. This is a saftey feature now standered in most cars to prevent damages to the vehicle and to insure its running propperly all the time. Noting to worry about unless you wait too long. If you do then

The cars computer will shut down the vehicle where it will become imnobile and noting can start it. There will be 2 ways to get it to move,

1. Call a wrecker
2.) get a mechaninc to clear the counter and fool the system into thinking it was surviced.

BTW AFTER THE CAR HAS BEEN SERVICED AND THE CODES CLEARED AND RESET, THE MECHANINC WILL NEED TO RETIME THE THROTTLE BODY, this is done by
1.) opening the driver door,
2.) disconnecting the negative battery pole
3.) pushing the axcellerator right down to the floor and holding it there while someone reconnects the battery pole
4.) starting the vechicle with the peddle right down and then slowel releasing ..

Thats about it.. No need to worry, just get the vehicle surviced.

Posted on Jul 31, 2008

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  • Rishi Roshan Ali Jul 31, 2008

    BTW failure to service may result in damages to the engine and transmission, if you need more details on this you may contact our dealer, normally its done with the car has a certin amount of milage to it.

  • Rishi Roshan Ali Jul 31, 2008

    Then the codes and counters were not reset, You will need to take it back and have them reset it. As this was part of the service package they will have to do it for free.,, Once the vehicle is functional without any seeming problems and this light it on, it mean you need to service the vehicle, especially the timing belt.

  • Rishi Roshan Ali Jul 31, 2008

    if it was a sensor ,,the bmw feature shyts the vehicle down. it isnt a code it just needs clearing and resetting.

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Grounded electrical wiring ,due to worn out insulation,try to check this out..

Hope this may help;

Regards,
VOTIT

Posted on Jul 31, 2008

  • LORETO LACARON
    LORETO LACARON Jul 31, 2008

    Check pin 5 for ground and 16 for battery voltage. Seehttp://www.auterraweb.com/obdiipinout.ht...



    Pin 5 was grounded, pin 16, however had no voltage. I took a closer
    look at some of the fuses test light and found that the fuse labeled
    "CIGAR" was blown in such a way that it was hard to see. I replaced it
    and was able to read the codes. Now I have to figure out what those
    mean:



    CODE #1: P1518 - PCM to TAC Module Serial Data Circut

    CODE #2: P0440 Evaporative Emission System

    CODE #3: P0440 (Pending) Evaporative Emission System



    FREEZE FRAME DATA FOR P1518:

    Fuel Sys 1 OL

    Fuel Sys 2 OL

    Calc Load (%) 0

    ETC (°F) 190

    STFT B1 (%) 0

    LTFT B1 (%) 0

    STFT B2 (%) 0

    LTFT B2 (%) 0

    MAP (in HG) 25.1

    Eng RPM 0

    Veh Speed 0

    MAF (lb/min) 0

    TPS (%) 15.2





    And yes, I have checked my gas cap! I'll be extra sure to make sure its
    on as tight as I can get it just to be sure. I have cleared the codes
    and will watch for the light again.


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Can you please explain the problem in detail sir?
it will help us serve you better

Posted on Jul 31, 2008

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honeymokey
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SOURCE: Grand Am 2003 "service engine soon" light

The service light means something is wrong with the car and it needs attention now. Get the codes checked and that will tell you what is wrong with it.

Posted on Jun 17, 2009

REDOIL
  • 355 Answers

SOURCE: service engine soon light

NO THEY ARE THE SAME SOMTHIG IS WRONG

Posted on Oct 14, 2009

  • 437 Answers

SOURCE: "Service engine soon" light came on, how soon is

have it scanned then decide depending on the code

Posted on Feb 10, 2011

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