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I received the following fault codes from running the Durametric Software on car and would greatly appreciate suggestions on how to address them.

P1602 Porsche fault code 108 Supply voltage open circuit.

P1319 Porsche fault code 62 Misfire emissions-relevant

P1313 Porsche fault code 50 Cylinder 1 misfire

P0300 Porsche fault code 75 misfire damaging to catalytic converter

P0301 Porsche fault code 63 cylinder 1 misfire damaging to catalytic converter

My car started idling rough and I discovered a bolt missing from the right header.

Do I need to replace the catalytic converters? If so would replacing the cats with bypass pipes cause emissions problems down the road.

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P1602 Voltage Supply - Open Circuit

Usually this is caused by disconnecting the battery. No harm just reset.

P0300 Misfire Damaging to Catalytic Converter

P0301 Misfire, Cylinder 1, Damaging to Catalytic Converter

P1313 Misfire, Cylinder 1, Emission Relevant

P1319 Misfire, Emission Relevant

Possible causes:

- Fouled, faulty or incorrect spark plugs

- Contact resistance (coil pack)

- Loose contacts

The car should not be driven with these faults (and the CEL is likely flashing too).

Was the missing bolt on cylinder 1? If so, replace it and clear the codes and see if they come back.

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Thanks Loren

The header bolt that was missing was the furthest forward bolt on the right side. The car has only been driven around the block. At first the CEL wasn’t flashing (when parked) but started went I took it around the block after discounting the battery for a few minutes.

I will replace the spark plugs and the coil packs (about 75k miles on both) and of course the missing bolt. I’m thinking that I don’t need replace the header gasket?

Time to contribute again I think.

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