Re: ABS/PSM warning light
I am having the same problem with my 2000 C2. It began with "surging" both under acceleration and constant throttle, and the illimination of the two lites. The stored codes never made any sense to the Porsche tech when downloaded. So I waited until the PCM and ABS lights were on took it to Porsche, left the motor on, and had Porsche connect their computer.
They downloaded two codes: one dealt with the mass air flow sensor, and the other with a torque reporting issue.
The local Porsche shop had no idea what these codes mean. They forwarded the downloads to Porsche for review. Porsche says begin with replacing the "thin film mass air flow sensor". Havent doen it yet, so dont know if it works.
What have you tried?
