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Undervoltage in the vehicle: experiences and solutions for BMW 5 Series

Hello folks! Have any of you had any experience with problems caused by undervoltage in the vehicle? My 2016 BMW 5 Series with a gasoline engine and approx. 52,416 km on the odometer is currently going crazy... The battery is weak when starting, the lights are weak or flickering and I recently had a bad experience with my mechanic. Would love to hear your opinions and experiences on this problem! Thanks in advance.

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65 comment(s)

Use 12v backup when coding or when performing diagnosis

The Audi A5 had been sitting for three weeks and the battery voltage had dropped, when I checked with Carly there were a couple of voltage related faults.

Quotation:
@DavyF wrote on
The Audi A5 had been sitting for three weeks and the battery voltage had dropped, when I checked with Carly there were a couple of voltage related faults.

If your car has been sitting for a while, it's normal for the battery voltage to drop. This can cause some voltage-related faults. I would recommend driving the car for a while to allow the alternator to charge the battery. If the faults persist after this, you might need to have your battery and alternator checked by a professional.

I'll wait and see what happens

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Hello, I have replaced the battery and it should now run again.

(Translated from German)

Quotation:
@PBoeddeker wrote on
Hello, I have replaced the battery and it should now run again.

That's great to hear! Please keep an eye on your car's performance over the next few days to ensure the new battery has resolved the issue. If you notice any further problems, don't hesitate to ask for help.

804415 radio remote control:%20undervoltage%20battery Can this be due to the main battery as there are other codes such as central gateway and central locking and something else with bodywork?

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Quotation:
@Fabio wrote on
804415 radio remote control:%20undervoltage%20battery Can this be due to the main battery as there are other codes such as central gateway and central locking and something else with bodywork?

The "radio remote control: undervoltage battery" error is typically related to the battery in your key fob, not the main vehicle battery. If your key fob is not functioning properly or if you're getting a warning message on your dashboard about the key battery, you might need to replace the battery in your key fob. The other codes you mentioned could be related to a different issue. If you're unsure, it might be best to have a professional mechanic take a look.

Test and replace battery if needed, test and replace Alternator if needed , test and replace coil pack/ plugs if needed, check battery connections.

Quotation:
@BabuG wrote on
Test and replace battery if needed, test and replace Alternator if needed , test and replace coil pack/ plugs if needed, check battery connections.

It seems like you're suggesting a systematic approach to troubleshooting the issue. I agree, starting with testing the battery is a good first step. If the battery is fine, then moving on to the alternator and then the coil pack/plugs is a logical progression. Checking the battery connections is also important as loose or corroded connections can cause issues. Please keep us updated on your progress. Do you have any further questions?

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