Test Step 4 - O2 SENSOR 1/1

Fig 1: Identifying O2 Sensor Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• Turn the ignition off.
• Reconnect the PCM C2 harness connector.
• Ignition on, engine not running.
• With the scan tool, monitor the O2 Sensor 1/1 voltage.
• Connect a jumper wire between the (K41) O2 Sensor 1/1 Signal circuit and the (K902) O2 Sensor 1/1 Return Upstream circuit in the O2 Sensor harness connector.

Is the voltage between 2.3 and 2.7 Volts with the jumper wire installed?

Yes 

• Verify that there is good pin to terminal contact in the O2 Sensor 1/1 and Powertrain Control Module connectors. If OK, replace the O2 Sensor 1/1. Refer to Removal and Installation .
• Perform the Powertrain Verification Test. Refer to PCM Verification Test (2009 - 2011) & PCM Verification Test (2012 & Up) .

No 

• Go to Test Step 5 - (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT OPEN