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Old 11-08-2019, 09:09 AM
Spillpot Spillpot is offline
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Overheating Red Warning and Limp mode but temperature guage only at 90

Today my 2014 F33 428i convertible produced an amber warning saying engine overheating - moderate driving. 5 mins later the alert went red and the car went into limp mode. I immediately pulled over and stopped the car for 20 mins. It then started OK, but within 2 mins was back in red and limp mode so I called roadside rescue and it's gone off to my local dealer to get looked at on Monday. Weird thing is the temperature gauge was showing normal temperature at around 80-90 degrees, and when I lifted the hood, there was no excessive heat coming from the engine or coolant tank.

Any ideas what might be causing the issue? Water pump failure perhaps? Unfortunately I don't have the car now so can't connect my diagnostic gadget.
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Old 11-08-2019, 09:25 AM
John MS John MS is offline
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The message was likely triggered by coolant temperature. Maybe the electric water pump is failing. Or something else related to the cooling system. The gauge measures oil temperature.
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Old 11-08-2019, 12:26 PM
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tturedraider tturedraider is offline
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Originally Posted by John MS View Post
The message was likely triggered by coolant temperature. Maybe the electric water pump is failing. Or something else related to the cooling system. The gauge measures oil temperature.
^ this. Another possibility is a failed thermostat.
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Old 12-19-2019, 03:10 PM
Spillpot Spillpot is offline
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I thought I should update the thread with the outcome for the benefit of others in the future. Turned out the issue was a faulty temperature sensor. It was reporting excessive temperatures and causing the engine management system to shut the engine down. There wasn't anything wrong with the temperatures So thankfully no damage done. My local BMW dealer fixed the issue for me. It still managed to cost me over 200 but that's BMW for you I guess. I suspect the sensor was in a helpfully inaccessible location.
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Old 12-19-2019, 03:29 PM
John MS John MS is offline
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Glad to read that the cause was identified and fixed. And that the engine is ok.
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