oil sending switch on 1995 Audi 90 Quattro

i changed oil to correct grade and KnN filter drove around and lights and dinging did not go off. When I got home noticed oil under car good size to. Found oil sending switch leaking so I replaced it with one i got from auto zone. Now light goes off and dinging again. do you need correct bar number for switch? I don't know what bar the one I got at autozone is? The one that came out says 1.6-2.0 bar. Still have good oil pressure. Only comes on above 2000 rpms. thank you

by in Mesa, AZ on February 04, 2011
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1 answer 1 comment
ANSWER by , February 05, 2011
This symptom will be cause by a failing oil pump. This is a common problem. Cost will run between 1000 and 1500. This includes timing belt replacement
COMMENT by , February 05, 2011
but i still have good oil pressure