Test Step 5 - (K141) O2 SENSOR 1/2 SIGNAL CIRCUIT OPEN

Fig 1: Measuring Resistance Of (K141) O2 Sensor Signal Circuit From O2 Sensor Harness Connector To PCM C2 Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• Turn the ignition off.
• Disconnect the PCM C2 harness connector.
• Measure the resistance of the (K141) O2 Sensor 1/2 Signal circuit from the O2 Sensor 1/2 harness connector to the PCM C2 harness connector.

Is the resistance below 5.0 Ohms?

Yes 

• Go to P0138 - O2 SENSOR 1/2 CIRCUIT HIGH Test Step 6 - (K904) O2 SENSOR 1/2 RETURN CIRCUIT OPEN 

No 

• Repair the open in the (K141) O2 Sensor 1/2 Signal circuit.
• Perform the Powertrain Verification Test. Refer to PCM Verification Test (2009 - 2011) & PCM Verification Test (2012 & Up) .