car makes a knocking noise
have a p011 code is this the cam sensor and what does it consist of in replacing on 2002 Nissan Altima
ck oil level 1st this is very common whn oil is low or dirty
1 more answer
Along with answer #1 , maybe have 'knocking noise' diagnosed if oil level is okay.May be faulty t-belt tensioner ,or other internal engine problem , making the cam sensor code a secondary issue.