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Why do all the warning lights turn on and the air conditioning stop working while driving a new Jetta?

2 Answers

DeSophia

08/28/25 4:24am

New Jetta's warning lights all turning on and air conditioning malfunction during driving may be caused by ECU CAN bus failure or poor contact at the ECU CAN interface. Excessive dirt and carbon deposits: Excessive dirt and carbon deposits can cause abnormal air flow, making it impossible to accurately control normal air intake, resulting in unstable gas content and poor engine performance. Low fuel pressure combined with poor constant pressure performance leads to inferior system atomization, making the vehicle difficult to start. Automotive dashboard: The automotive dashboard is a device that reflects the working status of various vehicle systems. Different vehicles have different instrument panels. However, conventional gauges in most vehicles include speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charging gauge, etc.

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DiEmmanuel

09/10/25 2:53am

As a car enthusiast, I think the situation where all the warning lights on the new Jetta illuminate while driving and the air conditioning stops working is most likely a major electrical system issue. I've studied many similar cases, such as failures in the vehicle's control module or CAN bus network. When this happens, various sensors start reporting errors indiscriminately, and all the lights turning on is a clear signal. The air conditioning failure could be due to insufficient power supply or the control unit shutting down. Factors like an aging battery, blown fuses, short circuits, or poor grounding can trigger this chain reaction. I recommend stopping the vehicle immediately for inspection rather than continuing to drive to avoid further damage. It's best to use a diagnostic tool to scan for trouble codes and identify the specific cause. Regular maintenance should include attention to the battery and connectors, with periodic cleaning of wiring harnesses as a preventive measure. If you're unsure about such issues, it's crucial to visit a professional repair shop promptly—safe driving comes first.

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