Moin, short history: Our Seat Ibziza failed during the last headup examination. The rear shock absorber springs, as well as a leak in the exhaust system were faulted. Both have been fixed by a buddy of mine. When trying to start the car for a test drive, it ran very rough and went out afterwards. After that the car could not start. After the error was read out (sporadic error Nochenwellensensor) I have a new camshaft sensor worried. This was installed today and the fault filler deleted. The car still no longer starts, error memory now shows no errors. The following things we tested: – Battery Spanning 11.9V, start with booster brought no success – Brake cleaner in suction application – no success – Check of the belts: everything turns when starting – Check of the chain: camshaft turns – Check of the fuses: all in order – During the start process are noticeably L airflows from the exhaust were removable, the cylinders seem to work. Who has ideas about what can still be purged to find the error?? Seat Ibiza 6j, 1.2L ADN, built in 2009, about 130,000KM, control chain renewed at 110.00KM. Thanks Greeting Christian