RC490

The a4 was running perfectly fine one day then the next, every single thing in that car went crazy. Interior lights flashing, climate control and radio stay lit with headlight switch off. Every single light on dash is flashing, gauges don’t work. Gas gauge starts on full then goes up. Dashboard sounds like it’s dying. Took the ecu out and switched it with another Immo deleted one and nothing changed. Car still starts and runs but it gave me and overboost code along with a maf sensor code along with the ECU code. I need help!!! Thank you

W261w261

Low voltage situations can result in multiple lights and warnings. Get ahold of a battery checker (a/k/a "toaster"). Check for the voltage at the battery terminals with the ignition off - should be 12v at least. Then use the toaster function to put a stress on the battery - the needle should be be in the green. Then turn on the car and check the voltage at the battery - it should be around 14v.