A6 Sedan V6-3.2L (BKH) (2007)
-
Using a multimeter, check the Heated Oxygen Sensor (HO2S) electrical harness connector terminal 5 to ground (GND) for voltage.
-
Turn key on.
-
Operate the starter briefly.
Specified value: Battery voltage.
-
Switch the ignition off.
If there is no voltage again:
-
Using a multimeter, check the wiring connection from the Heated Oxygen Sensor (HO2S)electrical harness connector terminal to the Engine
Control Module (ECM) Power Supply Relay (J363) terminal through the fuse for resistance.
Wiring resistance: 1.5 ohms max.
-
If necessary, repair the wiring connection.
-
If the wiring is OK:
Check Ground (GND) activation