Why does the Audi ignition turn on but fail to start?
2 Answers
Audi ignition turns on but fails to start due to B281 circuit break, causing the engine control unit to lack the 15-line power supply, which prevents the engine control unit from functioning properly. Here is an introduction to some related content about Audi vehicles: 1. Models under the brand: Audi A3, Audi A5, Audi A6L, Audi Q3, Audi S4, etc. 2. Introduction to Audi A6L: The front suspension is a five-link independent suspension, and the rear suspension is also a five-link independent suspension. It is equipped with a 2.0T turbocharged engine, with a maximum horsepower of 190 PS, a maximum power of 140 kW, and a maximum torque of 320 Nm, paired with a 7-speed dual-clutch transmission.
I once drove an Audi A6, and it was quite common for the car to have power but fail to start. I remember one time the battery was dead—the dashboard lit up but the engine didn’t respond, and the voltage measured less than 9 volts. It might have been caused by leaving the radio on or an old battery failing. Jump-starting or replacing the battery could help. It could also be an electrical issue, like a faulty starter solenoid or loose wiring—tightening the connectors might work. Additionally, Audi’s anti-theft system sometimes locks out the ignition if the key isn’t properly coded, requiring reprogramming or a professional unlock. I recommend regularly checking the battery’s health to avoid excessive aging, which can save a lot of trouble. If you can’t fix it yourself, asking a fellow car enthusiast for help or taking it to a repair shop is the safest bet.
