I recently had to replace the cat on my car following a theft, and I opted to got for a sports cat since it was cheaper than an OEM part (Honda wanted 2k!)  And while the car runs absolutely fine with no apparent problems, the EML light keeps coming on.  I'm assuming it has something to do with the non OEM cat, but any ideas you may have would be appreciated.

 

Car is a 2002 Honda HR-V 1.6 (103 4x4) if that helps.

 

Thanks

David.

Hi David.....it could be an air leak caused by a perforation or leak in the gasket or flange area.
This would cause the Oxygen sensor to read high oxygen content and flag an error.

Check there is no leak in the exhaust and then check Oxygen sensors for correct operation