P0135

NOTE:
- The heating of the O2S in front of the Three Way Catalytic Converter (TWC) are switched on by the fuel pump relay.
- The diagnostic trouble code "P0135/16519" is set as soon after engine start as the heating current, at a battery voltage between 9 volts and 16 volts is between 280 and 520 mA for longer than 1 sec (battery voltage fluctuations).