VW T-Roc TDI Turbo Failure Symptoms Point to PSensor

Had similar issues with a Golf 2.0 TDI from 2017. The symptoms matched exactly, turbo boost problems, whistling noises, and irregular power delivery. The check engine light was triggered by a boost leak in the intake manifold system. The root cause was a disconnected sensor plug and damaged wiring near the air intake. The connector had worked loose over time, causing incorrect readings and turbo system malfunctions. The ECU was getting faulty pressure data, leading to those performance issues. This is typically a serious problem requiring immediate attention, as continued driving risks damaging the turbocharger. The repair involved replacing the wiring harness and securing all sensor connections properly. Also needed a thorough inspection of the entire intake system for any additional leaks. These symptoms strongly suggest checking the boost pressure sensor connections and surrounding wiring first. A full diagnostic scan would confirm if its the same issue. Worth getting it fixed quickly to prevent potential turbo damage.

Thanks for sharing that experience, sounds exactly like what my T-Roc is doing right now. Going to get it checked soon. Would you mind letting me know how much the repair ended up costing in your case? Also curious if youve had any other issues with the boost or turbocharger system since getting it fixed? Want to know what to expect at the workshop.

Had the T-Roc checked by the mechanic last week, and your instincts were spot on. The issue was indeed a bad boost pressure sensor, specifically a faulty cable connection that was causing incorrect readings. The turbocharger itself was thankfully in good condition. The total repair cost came to 95€, which covered fixing the defective plug connection and running a full diagnostic check. The engine light turned off immediately after the repair, and the car has been running perfectly since then. No more power loss, strange noises, or irregular acceleration. The turbo boost is now working as it should, and fuel consumption has returned to normal. The air intake system was also inspected thoroughly to rule out any other potential issues. Have put about 500km on it since the fix without any problems reoccurring. If your symptoms match what I experienced, you might be looking at a similar straightforward fix. Worth mentioning to your mechanic to check the boost sensor connections first before diving into more complex turbo system repairs.

Thanks for the helpful advice. Finally got the car checked out at a different workshop yesterday. Just like mentioned, it turned out to be a faulty boost pressure sensor with some damaged wiring. The mechanic spotted it right away after hooking up the diagnostic tool. Total bill came to 120€, slightly more than expected but worth every cent. They replaced the defective sensor, fixed the wiring, and ran a complete turbo system check. The whistling noise disappeared immediately and the engine pulls strong again with no jerking. Best part is fuel consumption dropped back to normal levels. Put about 100km on it since the repair and everything works perfectly. No more check engine light or power issues. Really glad I caught this early before it could damage the turbocharger. For anyone facing similar symptoms, definitely get the boost sensor connections checked first. Could save you from more expensive repairs down the line.