What is the oxygen sensor code on a Jeep Wrangler?
Jeep Wrangler P0138: Oxygen Sensor High Voltage (Bank 1 -Sensor 2) P0138 is a common OBDII code that occurs in many vehicles, including theJeep Wrangler. The code is triggered when: There are also some less likely problems that can cause P0138.
What causes the p0138 code on a Jeep Wrangler?
Here are the most common issues that cause the P0138 code in the Jeep Wrangler. They are presented in order (somewhat) of most to least likely to cause the problem. Bad Oxygen Sensor – The O2 sensor itself is one of the most likely reasons that P0138 is triggering your service engine soon light.
What happens when an oxygen sensor goes bad?
When an O2 (oxygen) sensor go bad, it’ll cause your Jeep Wrangler‘s engine to run less efficiently. Your Wrangler can exhibit symptoms when the Oxygen sensor has gone bad. Or, it may exhibit none at all. Often enough, the only sign of the problem at all is the service engine soon light being on.
What are the colors of the O2 sensor wire?
Colors look similar to what I suggested but missing grey with the brown. Appreciate the helping hand. Maybe your brown actually has a hard-to-see grey tracer.. that’s a heater line, so connected to a white would make sense. Indeed the white wires are the heater wires, the black wire is the positive or signal wire and the grey wire is the ground.
How to test the O2 sensor on a Jeep Wrangler?
To test the heater part all you need is a multi-meter. With the sensor at room temp around 77 degrees F (25 degrees C). Put the both red and black lead across the white wires. Resistance should read between 5 and 7 ohms between the two wires.
Is the Jeep Wrangler TJ sensitive to oxygen?
Pay close attention to this one so you can do it once and do it right! The Jeep Wrangler TJ is extremely sensitive to all oxygen sensors other than NGK / NTK. Bosch O2 sensors and all the others (including the crappy Chinese brands you’ll buy at your local auto part store) are very well documented as not working properly with our TJs.
When an O2 (oxygen) sensor go bad, it’ll cause your Jeep Wrangler‘s engine to run less efficiently. Your Wrangler can exhibit symptoms when the Oxygen sensor has gone bad. Or, it may exhibit none at all. Often enough, the only sign of the problem at all is the service engine soon light being on.
Why does my check engine light come on on my Jeep Wrangler?
Oxygen sensors can change the way that your Wrangler’s engine runs. Most of the time, the check engine light will come on. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test.