bitxo7
HI;

We have 4 porsches 991 GT3 Cup 2014.

All of them in the dashboard displayed this alarm....it is related to ECU malfunction.

What i need to check and if it is possible to reset it and how to do it?.

Thank you.

Best regards.

Victor
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AlastairF
Hi Victor,

The alarm on the display is equivalent to the 997 ECU Malfunction Indicator Lamp.

The MS4 Mildiag alarm that you see is the MiL coming from the Bosch ECU via the CAN bus on the 991.

Sometimes we see this alarm when the outside Marshal Emergency shutdown switch is used to stop the car as it cuts the power to the ECU before it is ready.

From what we understand - to clear this requires the issue to be investigated on the Bosch ECU. Please contact Porsche Support at PAG to get some assistance on clearing this alarm.

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bitxo7
Hi;

Thank you very much...yes i will contact Porsche.

Regards.


Victor
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