1998 Kia Sophia 4 cyl Two Wheel Drive Automatic 108000 miles
1998 Kia Sephia LS 1.8L 108,000 miles.
The code is P0422 Main catalyst effinciency below threshold (bank 1)
I've replaced the spark plugs, spark plug wires, both oxygen sensors (Aftermarket), Catalytic converter (Aftermarket), I've cleaned the throttle body, new air filter, new intake air hose, no vacuum leaks, I've spray cleaned the MAF Sensor and I use fuel injection cleaner three times a year.
The engine light still comes on for the same code P0422. No matter how many times I turn the light off, it still reappears.
What should I do next?
have the same problem?
Sunday, February 1st, 2009 AT 6:55 AM