Dakota R/T 2WD V8-5.9L VIN Z (1998)
Oxygen Sensor: Testing and Inspection
To perform a complete test of the O2S sensors and their circuitry, refer to Powertrain Management/Computers and Controls/Testing and
Inspection/Procedures/Diagnostic Charts. To test the O2S sensors only, refer to the following:
This engine/transmission combination is equipped with 4 oxygen sensors (pre-catalyst, post catalyst, left and right).
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 ± .5 ohms and 7 ohms. Replace the sensor if the ohmmeter displays an infinity (open) reading.