2005 Honda Civic hybrid: Engine light came on and has been determined that the catalytic converter needs replacing along with the CO2 sensors, cost $2000. What causes a cat conv to go bad? Honda could not provide this information and refused to look into any service bulletins or recalls. This vehicle is only 6 years old, 83045 miles. We have had numerous issues with this vehicle, including the clutch, replacement of hybrid battery, seat belts and now this.

- Johns Creek, GA, USA

Replace cat converter on Honda Civic hybrid which is very expensive not covered by warranty.

- Chicago, IL, USA

The need to replace 2 catalytic converter due to an engine light error veh code P2000 cat efficiency.

- Chicago, IL, USA

After about 75,000 miles on my 2005 Honda Civic, I began to notice I got a headache and upset stomach while driving the car. The local Honda dealer discovered a cracked exhaust manifold, and indicated the possibility of carbon monoxide entering the cabin during vehicle operation. I have not yet repaired the condition since the repair cost is very high, about $1000. I have since heard that this is a common problem with this vehicle, and not a result of age or abuse.

- Huntsville, UT, USA