How many vacuum lines are there on a 2001 Audi Allroad Quattro?

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Shop says that they recommend we replace the vacuum lines to fix the cause of check engine light. Codes pending: P1411- SAI Bank 2 P1423- SAI Bank1 They also say that the hose to the combi(?) is too long and pinched, also some clamps missing. Wouldn't be possible to fix only the one hose that's pinched to solve the check engine light problem instead of the $500 it costs to replace all the vacuum hoses, most likely?