I do not have a manual for my Jeep so I need to know where the Oxygen sensor is located and if this is what I need to fix my problem from code 21?
You have two oxygen sensors but 21 is upstream sensor. This is the sensor between engine and catalytic converter. There is three possible problems that it could be.
1 oxygen sensor input voltage maintained above the normal operating range.
2 no signal at 02 2/1 sensor
3 oxygen sensor input voltage sustained above thenormal operating range. What all this means is you need to replace the sensor.
when getting the replacement this is your O2 2/1 sensor.
SOURCE: P0340 code in my Jeep Liberty 2002
Since a P0340 Could be either the Cam Position Sensor or The Crank Position Sensor they are obviously in 2 different spots, however they both either sit on the back of the engine or on the transmission bellhousing. Your Cam Sensor is at the top and your Crank Sensor is near the bottom.
Hope this gives you some direction. Thanks for using FixYa!
Sincerely,
JC
SOURCE: The computer Code of P0132 has come on
Okay, good, that makes it a bit easier. That code refers to sensor B1S1 or Bank 1, Sensor 1. Bank 1 refers to the side of the motor that has cylinder #1. Since you have an in-line six cylinder, that part is easy since there's only one side. Sensor 1 refers to the sensor before the catalytic converter. Since you have only one bank, and one exhaust pipe, that means its the O2 sensor before the catalytic converter.
You only have two O2 sensors, one before and one after the catalytic converter. Check the wiring and connector on the sensor before the catalytic converter and if all seems good there, then replace the sensor itself and see if that does the trick.
SOURCE: Oxygen Sensor jeep liberty
well first off depending on the year you could have up to four.now the easiest thing is to check trouble codes by turning yor key three times.now move it to the first position it moves to.thats were you need to end at all three times.now from that position you will move it quickly to the position when the accessories and idiot lites lite,right before it hits the starting position.so do that three times and wala if you got a problem with it your gonna know which one of the four you need to replace.follow the imortal saying of if it aint broke dont fix it ,oh ya to locate just look at other answer
SOURCE: 2001 Jeep Gr Cherokee V8 trouble code P0155 Oxygen
Sensor #1 is the sensor before the converter (upstream sensor)
SOURCE: how to replace the Battery Temperature Sensor
it is located under the battery in the battery tray.
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