Where is the O2 sensor on a Toyota 4Runner?
Downstream or rear O2 sensor. The front sensor may be hard to reach up far enough to disconnect the wiring harness. If you just cant reach it from under the truck, you can get to it from the inside of the cabin. You will need to remove the center console around the gear shift and you should be able to reach the connector from there.
Where is the oxygen sensor on a Toyota?
Here’s how it’s done: Find the oxygen sensor by looking for a spark plug looking part connected into your Toyota’s exhaust — it will have an electrical connection on it. Disconnect the electrical connection using a flathead screwdriver to push in the tab and pull the connector apart.
Where is the catalytic converter on a Toyota 4Runner?
Use the approved jacking points and jack stand locations for safety. From the passenger side door, crawl under your truck and locate your exhaust pipe. In between the front and rear section of this pipe, you should see your catalytic converter.
Can a bad O2 sensor cause a Toyota to misfire?
Rough engine idle. When your Toyota has a bad O2 sensor, it will often idle irregularly or roughly. Engine misfires. A bad oxygen sensor can disrupt the engine combustion, causing it to misfire. These misfires are usually more pronounced at lower idle speeds.
How do you remove the rear O2 sensor?
Then disconnect the rear O2 sensor pigtail from the main wiring harness. With the rear O2 sensor completely removed, you can modify it on your work table or where ever you want, instead of cutting and splicing while underneath your rig.
Can a bad O2 sensor cause a cel?
If you are getting a CEL for a bad O2 sensor, the trouble could actually be from the MAF sensor. If you have tried cleaning it up but still get the error code, it’s time to change your O2 sensor.
Can you use a URD O2 sensor simulator?
Use only a URD O2 Sensor Simulator on these vehicles to avoid poor performance, drivability issues and poor MPG. I agree that a true simulator probably wouldn’t work, for the reason stated above about calibrating the front wideband.