Engine Drivetrain 1st Gen Cooper S '03 S P2300/2303 codes

Discussion in 'Tuning and Performance' started by miniconcarne, Mar 14, 2012.

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  1. miniconcarne

    miniconcarne New Member

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    Hey folks, I have an issue that I need help with. I was running the car after a little maintenance it died. I now have P2300 and P2303 (P2300 Ignition Coil "A" Primary Control Circuit Low/ P2303 Ignition Coil "B" Control Circuit Low). It cranks over but won't fire. Checked, and all fuses are good, and it has a new battery as of today. It was low on fuel during all this so I added a few gallons (fresh) still no luck.

    Please give me guidance....

    Bryan
     
  2. Nathan

    Nathan Founder

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    A few things to check..

    If you pulled the plug wires, did you put them back in the proper position?

    Are the plug wires fully seated?
     
  3. Camaro

    Camaro New Member

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    If what Nathan says checks out still have codes...pull the ignition coil and check the bottom if its white (see picture below) it is dead. If its black its good and then if its grey its inbetween.

    [​IMG]
     
  4. miniconcarne

    miniconcarne New Member

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    Everything looks good with the coil and wires, Thanks. Still nothing..
     
  5. Camaro

    Camaro New Member

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    How many miles since the last time you changed plugs and do you have another set of plugs laying around? Swap out the plugs and report back ;)
     
  6. miniconcarne

    miniconcarne New Member

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    swapped out plugs, nothing..
    I'm getting that expensive fix feeling.
     
  7. Camaro

    Camaro New Member

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    Did you clear the code? If not it won't clear on its own. The ignition system on the MINI is simple....plugs, plug wires, and coil.
     
  8. miniconcarne

    miniconcarne New Member

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    Sure did, and the code(s) always come back after failed attempt.

    ...and in my foggy memory, I had a P003X initially after it died. HO2S heater Control
    Circuit High, unfortunatly in my haste, I erased this before I wrote it down. I don't know
    which sensor it was. What I do know is not much, and I can prove it.

    Bryan
     
  9. Camaro

    Camaro New Member

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    The one your foggy about is not ignition related its emissions related (o2 sensors). The ones we are concerned about are related to ignition system. Coil, Wires, Plugs.

    Stock coil or aftermarket coil? How many miles are on the car?
    Stock wires or aftermarket wires? How long ago have you changed wires?
     
  10. miniconcarne

    miniconcarne New Member

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    Coil is OEM and new, wires are aftermarket and new (will try stockers), Car has 76k.
     
  11. miniconcarne

    miniconcarne New Member

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    OEM wires reset code, nothing. It acts like it's out of gas, fuel pump is working, I need to see if I have spark...
     
  12. miniconcarne

    miniconcarne New Member

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    Getting fuel but no spark...
     
  13. Camaro

    Camaro New Member

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    Check the bottom of the coil it could have failed freakishly
     
  14. miniconcarne

    miniconcarne New Member

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    Bottom of coil still black..I'm at a loss.
     
  15. ScottinBend

    ScottinBend Space Cowboy
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    Possible bent pin on the coil connector?
     
  16. miniconcarne

    miniconcarne New Member

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    All looks good, I think I may need professional help. I should also find a MINI mechanic too..
     
  17. DeFrankbr

    DeFrankbr New Member

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    Was this ever resolved?

    I am having a similar issue with my R53 and not sure where to go from here. Was this issue ever resolved and do you remember what happened?
     
  18. MiWa68

    MiWa68 New Member

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    I went through this on an '03 Mini R50. Turned out to be a bad resistor in the ECU. Sent out to SIA Electronics for repair and 3 days later and $220, everything worked fine again.
     
  19. MCS02

    MCS02 Moderator
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    Welcome to MA. Thanks for posting. How did you find the problem?

    I have a ABS unit I need to have repaired.
     
  20. MiWa68

    MiWa68 New Member

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    process of elimination. For the Coil pack, you can test the resistance. I then checked continuity between all the injector connectors and the harnesses. Last was to check the plug lead wires. Everything checked OK, so the ECU was the only thing left.

    For the ECU, I sent it to SIA (http://siaelec.com/) and they ran a diagnosis based on my reported problem. They found and repaired the transistor. They also work on ABS modules, so I'd give them a call. Turnaround was 1 week.
     

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