Durango 2WD V8-5.2L VIN Y (1999)
Oxygen Sensor: Testing and Inspection
To perform a complete test of the 02S sensors and their circuitry, refer to the DRB scan tool and appropriate Powertrain Diagnostics Procedures. To test
the O2S sensors only, refer to the following:
Upstream Oxygen Sensor Location
The upstream O2S sensor is located on the exhaust pipe.
Downstream Oxygen Sensor Location
The downstream O2S sensor is located on the outlet end of the catalytic converter.
Each O2S heating element can be tested with an ohmmeter as follows:
Disconnect the O2S sensor connector. Connect the ohmmeter test leads across the white wire terminals of the sensor connector. Resistance should be
between 4.5 ± 0.5 ohms and 7 ohms. Replace the sensor if the ohmmeter displays an infinity (open) reading.