Honda Civic Repair Question
Topics covered: Sensor, Check engine light, Engine.
Mileage: No information provided.
Mileage: No information provided.
Asked on August 13, 2006
Troule code p0420
Catalyst System Efficiency Below Threshold (Bank 1) , one repair technician told me I should replace a new catalyst converter, but another one told me to replace the new O2 sensors, what should I do? thanks.
Asked by veveyaAnswer
Replied on August 14, 2006
Have someone check the 02 sensor wave patterns on a scope or for being out of spec. In particular the front one. Converter is probably fine,but further testing should be done. If testing was done, not just a conversation, then you'll need to have faith in one of the techs. That code points to bank1-02 sensor. The front sensor evalutes gases before entering the converter and the rear one evaluates it after the converter