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Emissions Failed in 1996 993 C2
1996 Porsche 993 C2. 21k miles. Failed Emissions.
Car has no CEL on. I checked the OBD Fault codes and System readiness. Cleared the fault codes and they have not returned after 140 miles of driving all day. Motronic 5.2 M07 Current Fault Codes 108 Supply voltage 80 Secondary air injection system Cylinder (1-3) OBD status OBD status - no warm up cycle pass OBD status - warm up cycle fail OBD status - driving cycle pass OBD status - trip completed fail OBD status - system fault fail The car runs fine. Any idea what to do in this case? |
The secondary air injection code is probably what is causing it to fail. The 993's are notorious for that system and the ports in the heads to get clogged with carbon. There is an 6 hour repair where the system is flushed and attempts to run the carbon out. If that doesn't work, then the top end needs to be removed and have the carbon drilled out of the heads.
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