Question about 2004 Jeep Liberty

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PO137, PO 138 codes

I have a PO137 bank 1 sensor 2 and a PO138 bank 1 sensor 2 code showing on my 2004 Jeep what does this mean and which sensor is it that needs to be changed driver side, passenger side?

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  • abozic75 Oct 07, 2008

    Got a PO137. Don't know which sensor this is or its location.

  • hillcrestgro Dec 10, 2008

    I also have a 2004 jeep liberty 105km and the code is po137 .. but if i clear it ..it stays off ..but will come on when its cold outside and in afew days will go off all by itself ..then in a few days come on again ..not on startup but after approx 3-5 min. into the drive ..stop and go traffic??? any thoughts??

  • Anonymous Mar 16, 2014

    I changed the sensor cleared the code light stayed off for 10 min then came back on

  • Anonymous Mar 21, 2014

    reading says left bank #2 O2 sensor is bad. where is it located?

  • Anonymous Mar 29, 2014

    code error po137 comes up what is it?

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Well on my car these are reffering to the sensors in the exhaust, the upstream sensor(before the cat) and the downstream sensor(after the cat) the downstream sensor can act up if it is lazy or sluggish, or due to a bad catalytic converter or a clogged one. however there are sensors on the exhaust manifold which are determined by driver side or passenger,my opinion is to get a scanner for about $100 to $150 and you can figure out many of these codes yourself.

Posted on Sep 19, 2008

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2005 jeep grand cherokee Po204 205 175 174 138 158. Runs rough. Whats wrong?


PO204,205 are injector circuit malfunction,PO174 is a system lean code, PO175 is system rich code, PO138 is heated oxygen sensor bank1 sensor 2 circuit high voltage, PO158 is heated oxygen sensor bank2 sensor 2 circuit high voltage. This is a repair for your mechanic. When they fix the injector and o2 circuits the rich lean codes will also be repaired. Continued driving will ruin your catalytic converter. Good luck

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What is the meaning code p 0138?


PO138--Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)

Next time Type: OBD PO 138 & read up

That is how you find codes

Now before you throw parts at the unknown, google &
study obd 2 systems & oxygen sensors

You will be very suprised how much there is to learn
about cars

Codes have to be diagnosed & parts component tested
BEFORE any parts get replaced

Have to find a problem first & have to test to find a failed
part,or why would you change one

The idea is to study & learn things,not take the short way out,
in hope of a quick fix,it will work a couple times with codes,
then your back here or at a shop

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Nothing to do with MAF

Also education & solutions can be for using Google

Put in------ OBD2 Codes PO138 nissan sentra

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