Volkswagen Misdiagnosed My Golf 7 14 TSI Engine Fault and Charged Me Unfairly
On April 28, 2025, I brought my 2015 Volkswagen Golf 7 1.4 TSI ACT engine vehicle to your Doğuş Oto Esenyurt service center after the check engine light turned on. The error code retrieved from the vehicle was P2177 – “System Too Lean Off Idle (Bank 1).” Based on this, I was informed that the lambda sensors in my vehicle were faulty. With my verbal approval, the sensors were replaced, and I received my vehicle back on May 8, 2025. However, after driving it, the check engine light came on again the same day, and I returned the car to your service center. Upon re-scanning, the same fault code appeared. This clearly indicates that the previously replaced lambda sensors were not faulty and that the repair was based on a misdiagnosis. Despite this, I was charged for the parts, and the following explanation was given: “The issue could be with the catalytic converter, throttle body, or rear muffler. We can order and install them one by one—maybe the problem will be solved, maybe not.” This trial-and-error approach, moving from cheaper to more expensive parts, shows a lack of systematic diagnosis and the refusal to refund for ineffective parts. Not only is this a technically flawed service, but it also constitutes a defective and incomplete service under the Consumer Protection Law No. 6502. Therefore, I request: 1) a full refund for the replaced lambda sensors and all related charges, 2) a written report of all diagnostic actions taken on my vehicle, and 3) a full review of this process in line with Volkswagen Turkey’s Customer Satisfaction standards. Otherwise, I will escalate the matter to the Consumer Arbitration Committee and other relevant legal authorities.
