Maybe. Have you tried resetting the CEL. Drive it and read it when / if the CEL comes back.
When the CEL comes on, is it always the same codes? Or do they change every time?
O2 sensors are about $150 each from Porsche. I've seen them for $25 each on E-Bay... but no idea of how good they are.
And you have 4 O2 sensors (before and after each Cat).
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My Porsche mechanic drives a Saturn.
'98 Artic Silver w/ Tip
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