Location Of The Oxygen Sensors
NOTE: The above illustration is for the 1996-1998 4.0L Jeep Grand Cherokee.
Where To Buy The Oxygen Sensor And Save Some $$$
If you find, after testing the downstream oxygen sensor that its heater element is fried, take a look at the links below. I think they'll save you some bucks:
NOTE: If you're not sure if the above O2 sensor fit your particular 4.0L Jeep don't worry, once you get to the site, they'll make sure the sensor switch is the right one, if not, they'll find you the right one.
More Jeep 4.0L Test Tutorials
If this tutorial was helpful/informative, you can find a complete list of tutorials here: Jeep 4.0L Index of Articles.
Here's a sample of the tutorials you'll find there:
- How To Test Trouble Code P0135 (1996-2000 Jeep 4.0L).
- How To Test The MAP Sensor (1997-2003 Jeep 4.0L).
- How To Do A Cylinder Balance Test (Jeep 4.0L).
- Jeep PWM Fan Relay Test Troubleshooting An Overheating Condition.
- How To Test The Crank Sensor (Jeep 4.0L -1997-2004).