Audi Case Studies, Blog, Case Studies Audi Case Study 30: Audi TT prompted check engine light Posted on May 5, 2021May 5, 2021 by admin 05 May The persistent “Check Engine” light flashing in Cindy’s Audi TT prompted her to make a detour to our workshop. Cindy’s Audi TT arrived in our workshop to check engine light. Popping the hood, our mechanic spotted milky liquid spilt over the engine bay. Unscrewing the oil cap, we noted the foamed coffee coloured liquid, an evident that the coolant fluid had contaminated the engine oil. Thorough engine oil flushing was in the order with new parts being replaced. The bad oil separator which had more than 20,000 km behind it is recommended for a replacement in order to effectively eradicate the issue. We are delighted to have restored Cindy’s faith in her Audi TT. Panel Beating with Spray Painting Restoration For Dent!Just Call Us! This Gorgeous BMW 218I Now Protected With Ceramic Paint Protection Coating!