Audi Q4 E-tron Multiple Electrical Failures Need Help

Last month I faced nearly identical symptoms with my Audi e-tron GT (2018). The battery drain issues started with dim lights and error messages, eventually leading to complete battery failure. The root cause was a faulty battery sensor causing incorrect readings between the battery management system and the main computer. This triggered multiple stored error codes and affected the entire electrical system performance. This is a known issue requiring specialized diagnostic equipment for EVs. The repair involved: Full electrical system diagnostic scan, Battery sensor replacement, Battery management system recalibration, Testing all battery terminals for proper connection The problem was serious since a malfunctioning sensor can lead to inadequate battery charging and potential damage to other electrical components. The repair required specific EV certification and tools, so finding a qualified technician is crucial. For any Audi EV electrical issues, its recommended to work with technicians certified in high-voltage systems. Given the complexity of EV electrical systems, attempting DIY fixes could compromise safety and warranty coverage.

Thanks for sharing your experience. Sounds very similar to what happened to my Q4. After reading about your battery drain problems, I had mine checked. The technician also found issues with the battery sensor and electrical system connections. The symptoms matched exactly, dim lights, error codes, and overall weak battery performance. Really helpful to know about the specialized diagnostic process you went through. Did you remember how much the total repair cost? Also curious if youve had any other electrical system problems since the fix?

Since having the battery sensor replaced, my e-tron GT has been running perfectly with no electrical system issues. The vehicle battery is now charging correctly, and all those annoying error messages have disappeared completely. The total repair came to 315 Euro, which included the diagnostic work and battery sensor replacement. The investment was worth it as the car is performing exactly as it should, no more dim lights or discharged battery problems. Its important to address these electrical system faults quickly, as a failing battery sensor can lead to more expensive repairs if left unchecked. A properly functioning battery charging system is crucial for EVs, and getting the repair done by certified technicians helped ensure everything was fixed correctly the first time. The battery management system is now reporting accurate readings, which prevents future battery failure issues.

I finally had my car checked at a certified EV repair shop. Found a great technician who diagnosed and fixed the battery sensor issue in just one day. The repair cost was 290 Euro, slightly less than expected. The electrical system is now working perfectly, no more dim lights or error messages. The vehicle battery charges properly and the speedometer works normally again. All battery terminals were cleaned and properly connected during the service. Really relieved I decided to get it fixed by professionals rather than trying cheaper alternatives. The technician explained everything clearly and showed me the faulty sensor. Best part is the battery charging system now works exactly as it should, and the onboard computer shows no more error codes. Definitely worth paying for proper diagnosis and repair rather than risking further electrical system damage. My Q4 feels like new again and I have peace of mind knowing the problem was properly fixed.