Query see below
I went to the dealer this week to get it replaced, but he ran a diagnostics again to check if error occured, but it didn't and they checked for any problem, and they found none, however he siad they did some adjustments on the engine via the computer, and said everything in the car is perfect. He said I don't need it replaced, and did not charge me for anything?
What should I do? Is it a case where it is computer controlled or if it is broken to replace it?
Should I take it elsewhere?