P0430 Code - 2001 Boxster

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Originally Posted by blue62

your P0197 code is listed as a short to ground/ lean mixture threshold.
I interpret that as an issue that is seen by the oil temp sensor which in turn tells the DME that the fuel air mixture needs to be leaned out. It has reached it's full lean limit and thus set the code. This in turn affects o2 sensor readings. which in turn could be the cause of the P0430 code.

Going with simplest things first diagnostic principals I would try to find out why the oil temp sensor is throwing a code.
It could be a wiring issue some where between the DME and the oil sensor.
It could be a faulty connection in that wiring.
It could be the oil sensor its self.

Point is find and fix the oil senor issue first. It should be simpler, easier and cheaper.
Once that is fixed it could fix the P0430 code as well.

These are just my thoughts and guess's on the issue

Thanks for the reply. I will start with replacing the oil temp sensor and see what happens.