I have a 1998 accord v6 with 106k miles and the check engine light came on. I recently did a full tune up changing the plugs, wires, oil, air filter, distributor cap and rotor. The check engine light has been on for a while now so I hooked it to the OBD, there were two readings
- EGR Valve Insufficient Flow
- Catalyst System Efficiency Below Threshold (Bank 1)

I dont know what it could be any more. About two monthes ago I replaced the catalytic converter so the i think it may be the post converter o2 sensor but i dont want to buy and install if the light is going to stay on. also I replaced the EGR valve right after I got the OBD codes. so the valve is brand new. If any one has any suggestions I would deeply appreciate it.

 

I believe bank 1 is before the converter, but I am not positive on that. Did you ever reset the ECU after the repairs/replacements?

 

Yea I did reset them but they came back on. i thought that as well but the guy at discount auto said the opposite

 

Do you happen to know the exact code numbers? Those would be helpful. The explanations from the code readers are often inaccurate for Hondas. I learned this the hard way and wasted a lot of time on a "wild goose chase" once.

 

x2 for getting the actual code number.

Bank 1 & bank 2 refer to actual dual exhaust where each bank of a V engine has it's own converter.

When talking about the O2 sensors; primary is before the cat, secondary is after the cat.