Yusran Abdul Rahman

Hi there…

I have 2009 Audi A5 2.0T, EPC light on, ESP light on, Parking Brake Malfunction ( brake still works), Power lost (perhaps limp mode), apart from power lost, engine still runnning fine. It happens many times now, and each and every time, i managed to restore the car to its normal function by removing and re- seating fuel pump relay and then clearing the fault code using carista OBD. The problem usually happens when i floor the pedal to accelerate quickly or when the engine load became bigger, sometimes it also happens even when i drive carefully and slowly. This problem happens after i opened the intake manifold to replace broken fuel injector and cleaned intake valve from carbon deposit and replaced leaked waterpump, i dont know if any of those has any relation to the problem, and fyi, I have checked and recheck all electrical connection for any loose connection. Any idea what might the problem?