Seat Leon 2 1.4 Tsi 2008: P0016 Error - Crankshaft & Camshaft Timing Correlation, Bank 1 Sensor A

Hello, I kicked a Seat Leon 2 1.4 Tsi 2008 car 140km about 2 weeks ago with mileage 140 thousand, and changed timing about 3 months ago, suddenly the check engine control light appeared and the error at the mechanic and the computer showed P0016 Correlation of crankshaft signals and fight timing - bank 1 sensor A (permanent error), the error was repeatedly cleared, however, after driving about 10 km or after restarting the car the error returned, the mechanic replaced the candles, but nothing came of it. I have no symptoms such as the noise coming from the timing, or starting problems only what I noticed this car while driving and adding gas has a slight break. If you had such a problem, share some information on what I could start with this problem, etc. Am I in danger of continuing to drive a serious breakdown?

Look for the problem in the timing belt. Chain pulled out or tensioner problem.
Change the mechanic, since after reading such an error he changes the candles, resets the error over and over and that's it.

And the possible replacement of the tensioner is the cost? And is it possible to do somehow this chain, or does it involve a complete timing replacement?

atson wrote:

Hello, I kicked a car Leon Leon 2 1.4 Tsi 2008 140km about 2 weeks ago with 140,000 mileage, and changed the timing about 3 months ago

If you are sure that the valve was actually replaced, it did not stretch after 3 months. The question was whether and if it was how it was made. A colleague above advised you on what the mechanic should focus on.