P0135

VAG 1551 Scan Tool Printout:

DTC P0135/16519

Notes:
^ B1 = Bank 1 (right side), S1 = Sensor 1 (front HO2S), B2 = Bank 2 (left side), S2 = Sensor 2 (rear HO2S).

^ O2S heater Z19 is switched on (B+ supplied) immediately at engine start via the fuel pump relay Ground (GND) to heater Z19 is controlled by the ECM.

^ DTC P0135/16519 is set after engine start when oxygen sensor heater current is less than or equal to 280-520 mA for longer than 1 second with battery voltage between 9-16 volts. Amount of current depends on battery voltage. For minimum current at a specified voltage, see table below:

Battery Voltage/Current Display: