What causes the EPC light to come on in an Audi A4?

1 Answers
DiMariana
07/30/25 1:01am
The reasons for the EPC light coming on in an Audi A4 are: 1. The throttle body is dirty or there is a fuel quality issue; 2. There is a leak in the intake system, causing the engine control unit to detect the problem and illuminate the EPC warning light; 3. There is a leak in the crankcase ventilation system; 4. The brake lights are not working, requiring inspection of the brake switch and wiring. It is recommended to visit a 4S shop or a professional auto repair shop to have a technician connect a computer and check the fault codes, then address the issue based on the specific cause. The Audi A4 uses a five-link independent suspension for the front and rear, and is equipped with a 2.0T turbocharged engine with a maximum power of 150kW and a maximum torque of 320Nm, paired with a 7-speed dual-clutch transmission.
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