DTC 16539

VAG 1551 Scan Tool Printout:

DTC P0155/16539

Notes:
^ B1 = Bank 1 (right side), S1 = Sensor 1 (front HO2S), 82= Bank 2 (left side), S2= Sensor 2 (rear HO2S).

^ Oxygen Sensor (O2S) heater Z28 is switched ON (B+ supplied) immediately at engine start via the fuel pump relay Ground (GND) to heater Z28 is controlled by the ECM.

^ DTC P0155/16539 is set after engine start when O2S 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: