VW Taigo Timing Belt Issues Killing Performance & MPG

Had the same symptoms on my 2020 VW T-Cross TSI. The sluggish performance and increased fuel consumption pointed to a misfire caused by incorrect timing signals between the crankshaft and cam sensor. The initial diagnosis showed timing-related fault codes, but the actual problem was a failing crankshaft position sensor. The reference values from the sensor were inconsistent, causing the ECU to receive incorrect data about engine timing. This made the engine run rich and perform poorly. The repair required replacing the crankshaft sensor and clearing the fault codes. While not the most expensive fix, accessing the sensor was labor-intensive since several components needed removal for proper access. The timing belt was inspected during the repair and showed no issues. This is a serious problem that should be addressed promptly. Continuing to drive with faulty timing signals can lead to increased engine wear and potential damage to other components. Getting a second opinion is reasonable, but make sure they specifically check the crankshaft sensor and timing-related components. After the repair, the engine performance returned to normal, fuel economy improved, and the check engine light stayed off.

Thanks for sharing your experience with the crankshaft sensor issue. My situation sounds quite similar, especially the misfire symptoms and engine synchronization problems. After seeing your detailed explanation, I am more confident about getting this fixed properly. Did you remember roughly how much the total repair cost was? Also, has everything stayed working correctly since the fix, or have you noticed any other timing-related issues coming up?

Thanks for asking about the follow-up. The total repair came to 340€, which included parts and labor. The crankshaft sensor replacement fixed the issue completely. The timing-related problems disappeared right after the repair. The crankshaft to camshaft reference value is now perfectly synchronized, and the engine runs smoothly. No engine light has come back on in the months since the fix. The fuel economy went back to normal immediately, and the sluggish performance is completely gone. The cam sensor readings are now stable, showing the repair addressed the root cause. It was definitely worth fixing rather than letting it potentially cause more expensive engine damage. No other timing-related issues have surfaced since the repair. The mechanic also confirmed the timing belt was in good condition during the inspection, which was reassuring for long-term reliability.

I took my car to the mechanic yesterday based on your feedback. The diagnosis confirmed exactly what you described, a faulty crankshaft sensor causing timing issues. The repair cost was similar, around 380€ for parts and labor. The mechanic showed me the old sensor and explained how its malfunction was affecting the camshaft timing signals. They also checked the timing belt while doing the work and confirmed it was still in good condition. Just picked up the car today and the difference is remarkable. The engine light is off, acceleration is smooth again, and it feels like a completely different vehicle. Fuel consumption already seems better on the drive home. Really glad I got this fixed before it could cause more serious engine damage. Thanks again for helping me understand what was going on with the timing system. This saved me from getting unnecessary expensive repairs that the first shop suggested.