So I took our '05 Cooper S (auto) in for a smog test today and failed for two reasons. First and foremost, the large post-filter intake hose had a big split in it that I had not seen. That's an easy fix & not what I'm worried about. Second, the tech showed me that OBD failed due to "Comprehensive Component Not Ready". The battery has not been disconnected for well over a year, so any systems / sensors should have had plenty of time to reset. Looking into what can cause this, it seems to be anything from a bunk o2 sensor to a bad thermostat to the need for an ECU reset. I'm wondering, could the split intake hose be the cause for this? If not, how can I investigate the cause further?

 

Fix the hose. Drive the car. Avoid any real hammering on the car. The OBD2 drive cycle calls for more sedate driving. I suspect the readiness monitors will all be set to complete. If not then you'll have one or more OBD2 error codes to help diagnose what's going on.

 

See, right now it has no codes at all so I was surprised to hear about the "Component Not Ready" situation at the smog tech. Is there any way I can verify that it's reset once the hose has been replaced & some miles have been put on? I have a Creator 110 scanner with updated firmware, should I reset adaptations or anything? It seems odd to me that the split hose would cause an issue the car would recognize, as it's essentially drawing from ambient anyway, right? Would it be the MAP sensor detecting that something's not right? Apologies for the string of questions, I just really don't want to go back with the repaired hose only to fail again.