3
votes
1answer
247 views

CEL code 43 on 1992 Civic

I'm getting CEL code 43 after doing a lot of work on my car (changing the head gasket, which involved removing and reattaching lots of exhaust and intake components, and replacing the fuel filter and ...
2
votes
2answers
1k views

1999 Honda Civic CNG, Flashing check engine light

I have a 1999 Honda Civic CNG with 140,000 highway miles. Initially, while driving the car at highway speed, the check engine light would flash and the car would lose power. I would have to stop and ...
5
votes
3answers
28k views

Check Engine code P0420 Catalyst efficiency below threshold bank 1

After months of normal driving with no problems, my 2003 Honda Civic EX check engine light came on during a long trip. Got it scanned and it's P0420: Catalyst efficiency below threshold bank 1. They ...