Audiwi

The traction warning lamp (the yellow one)of my A4 1.8T quattro lights up frequently for the past few days. The weather is fine with no rain. It usually occur when driving up a hill from start(at normal speed only) and suddenly the yellow sign lights up indefinitely. However, the computer self checking system doesn't indicate any fault at all. The sign just doesn't go out until I restart the engine. Everything seems OK until the same situation occur again.

The manual explained the traction light may light up indefinitely during driving and it suggest restart the engine. However, it doesn't explain why this would happen! This has never happened for the past whole year until recently. I remembered having slipped the clutch once during start off with high reving of the engine and the traction light turns on a few days later. Will it be related?

woofpup

The light comes on solid when a problem is detected with part of the ESP system. When it is lit solid in this manner, the system is disabled as a safety precaution.

Since it has been happening for you regularly, it sounds like a trip to the dealer is in order.

Audiwi

Thank you woofpup. I will have the car checked by the dealer promptly.

Audiwi

The dealer replaced the 'BRAKE SWITCH' and is OK now