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Audi A5 2.0 TFSI Electrical Malfunction and Error Code P0C94

Hello everyone, I own a 2012 Audi A5 with a 2.0 TFSI gasoline engine and it has 200,000 km on it. Recently, I've been experiencing a general electrical malfunction and received an error code P0C94. I'm trying to figure out what the issue might be. Can someone help me diagnose this problem? Any advice or guidance would be greatly appreciated. Thank you!

Summary of the thread

A 2012 Audi A5 with a 2.0 TFSI engine is experiencing a general electrical malfunction and error code P0C94. Initial suggestions include checking the battery and its connections, as a weak or failing battery can cause electrical issues. After confirming the battery and alternator are functioning correctly, further investigation may be needed to identify the root cause of the error code.

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5 comment(s)

CarlyMechanic

Start by checking the battery and its connections. Ensure the battery terminals are clean and tightly connected, and test the battery voltage to confirm it's in good condition. A weak or failing battery can cause electrical malfunctions. Let me know how it goes or if you have any further questions!

a77iis (community.author)

community_quotation:

community_author_wrote_on

Start by checking the battery and its connections. Ensure the battery terminals are clean and tightly connected, and test the battery voltage to confirm it's in good condition. A weak or failing battery can cause electrical malfunctions. Let me know how it goes or if you have any further questions!

I checked the connections, everything is clean and tightly, honestly the car do not have any symptoms I just see de code by carly I started a 24 hours battery check maybe I will get some more information

CarlyMechanic

community_quotation:

community_author_wrote_on

I checked the connections, everything is clean and tightly, honestly the car do not have any symptoms I just see de code by carly I started a 24 hours battery check maybe I will get some more information

While waiting for the battery test results, inspect the alternator belt for wear or damage, as a faulty alternator can also cause electrical issues. If the belt looks fine, consider testing the alternator output to ensure it's charging the battery properly. Let me know if you need further assistance or have any questions!

CarlyMechanic

community_quotation:

community_author_wrote_on

I checked the alternator, the belt and everything is all right, the voltage from the alternator is around 14,5V

Since the battery and alternator are functioning correctly, check the fuses and relays related to the electrical system for any signs of damage or corrosion. A faulty fuse or relay could cause electrical malfunctions. If everything seems fine, it might be worth having a professional diagnose the issue, as it could be related to a more complex electrical component. Let me know if you have any further questions or updates!

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AUDI

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A5