# Honda failing smog test **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [May 12, 2018, 5:08pm UTC](https://community.cartalk.com/t/honda-failing-smog-test/117284 "2018-05-12T17:08:35Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [May 15, 2018, 3:27am UTC](https://community.cartalk.com/t/honda-failing-smog-test/117284/14 "2018-05-15T03:27:28Z")
I battle Calif smog every two years with my early 90’s Corolla. You might want to read through this thread for some ideas on the HC component of your problem. Assuming theres no major mechanical problems with the engine and all the routine engine service is up to date, the nitrogen component suggests your cat may be due for replacement. > [@92 Corolla High HC Emissions](https://community.cartalk.com/t/92-corolla-high-hc-emissions/84622/58): > > Thanks for the reply in any event slight_smile --- _[View the full topic](https://community.cartalk.com/t/honda-failing-smog-test/117284)._