Kod 63 = Exhaust butterfly valve actuator malfunction, wiring open or short
If the exhaust butterfly valve actuator fails (the signal is out to the usable range, wiring short or open), the ECU stops the current to the actuator.
Kod 67 = Oxygen sensor heater malfunction, wiring open or short (Equipped Models)
If the oxygen sensor heater fails (wiring short or open), the ECU stops the current to the heater, and it stops the feedback mode of the oxygen sensor.