VW Nivus Power Loss & Rough Idle Points to Bad TB

Had similar symptoms on a 2020 VW T-Cross with the 1.0 TSI engine. The check engine light came on and the throttle response was inconsistent, causing rough idling and delayed acceleration. The issue turned out to be a faulty electronic throttle body module affecting both air flow and fuel efficiency. The problem required replacing the entire throttle body assembly since the electronics inside were defective, not just the mechanical components. This is a serious issue that affects vehicle drivability and safety. The air intake system relies heavily on proper throttle body function to maintain correct air-fuel mixture. When the module fails, it can cause the engine management system to enter a limited power mode as a safety measure. The repair process involved: Computer diagnostic scan, Throttle body removal and testing, Installation of new throttle body unit, ECU adaptation procedure, Test drive to confirm proper air flow and throttle response The repair resolved all symptoms including the rough idle, delayed throttle response, and check engine warning. This is not a job for DIY repair as it requires proper diagnostic equipment and programming capabilities.

Thanks for sharing your experience. Those are exactly the symptoms I noticed, especially the throttle response delay and rough idling. The car even went into limp mode once on the highway which was scary. Did you keep track of how much the throttle body replacement cost you? Also curious if the throttle sensor issues came back or if the fix has been holding up well since the repair. I want to be prepared before heading to the shop.

The total repair came to 265€ for fixing the faulty accelerator pedal module and electronics. Since having the throttle valve defect repaired, all the earlier problems with throttle response and engine idling have completely cleared up. The air flow is now perfect and the car runs smoothly without any hesitation or limp mode incidents. The repair has proven reliable, no throttle sensor issues or check engine lights in the months following. The investment was worth it since proper throttle control is crucial for both performance and fuel efficiency. Definitely recommend getting it fixed professionally rather than trying temporary solutions, as these electronic throttle problems tend to worsen over time. The most noticeable improvement is how responsive the car feels now, no more delays or rough idling when pressing the gas pedal. The engine management system works exactly as it should.

I went ahead and took my car to the dealership this morning after reading about your similar experience. The mechanic confirmed the throttle sensor was failing after running diagnostics. Total bill came to 290€ including parts and labor, pretty close to what you paid. The repair took about 2 hours and the difference is remarkable. No more response delay when pressing the gas pedal and the engine idling is perfectly smooth now. Fuel efficiency seems better too, guess the faulty throttle body was making the engine run rich before. Really glad I caught this early before ending up stranded somewhere. Thanks for sharing the details about your repair, helped me feel more confident about what needed fixing and saved me from getting overcharged at a unusual shop.