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Previous Thread Next Thread Print Thread Rate Thread 02 sensor problem, need help #823729 07/07/07 09:43 PM Joined: Feb 2007 Posts: 4 P palo OP Need a Spot I have a 2004 jeep Liberty Limited 4x4 with a 3.7L engine, The engine light came on and is throwing a code PO138 which is telling me there is a problem with one of the o2 sensors. It's telling me bank 1 sensor 2. Can anyone tell me which one of the o2 sensors is considered to be bank 1 sensor 2?. I can only see two sensors on the system, one on the right side front pipe closest to the r/s manifold and the other on the rear of the cat. Thanks for all responses. Re: 02 sensor problem, need help [Re: palo] #823730 07/07/07 10:15 PM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler That being a V type engine I'd guess there is a sensor on BOTH sides of the engine. Bank ONE should be the bank with the #1 cylinder on it...OR the most FORWARD of the front cylinders. I think you have missed locating one or more of the sensors. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: 02 sensor problem, need help [Re: BigJim] #823731 07/09/07 07:53 PM Joined: Feb 2007 Posts: 4 P palo OP Need a Spot Thanks BIGJIM,I will look at the exhaust and see exactly how many sensors are there. I was wondering thou if bank 1 is the side of the #1 cylinder which o2 sensor would be sensor 2 on the code readout?. Thanks again for all your help, very much appreciated. Moderated by  4x4Wire  Hop To Mitsubishi Forums ------  Mitsubishi 4x4 and SUV Tech  Mitsubishi Diesels  Mitsubishi ArchiveToyota Forums ------  Early Toyota Trucks  Toyota 4Runner, FJ Cruiser &...  T100 & Tundra Forum  Tacoma Forum  Toyota Tech ArchiveJeep Forums ------  Jeep Talk  Jeep TechIsuzu Forums ------  Isuzu 4x4 & SUV Talk  Isuzu 4x4 & SUV Tech  Isuzu DieselsKia Forums ------  Kia Talk  Kia Sportage & Sorento TechOff Topic Chat ------  4x4 Gallery  Off-Topic Chat  Recreational Access & Land ...  Politics4xForums ------  Outdoor Gear  General 4x4 Discussion  Tools and Fabrication  General Communications  Amateur Radio  GPS and MapsParts Bin ------  Private Party - Garage Sale  Private Party - Items wanted  Vendors, Hot Deals, Group Buys4x4Wire Back Yard ------  Suzuki Forum  AZ Crawler Crew  Cal-Nev Crew  General Ford 4x4 & SUV Forum  General Dodge 4x4 & SUV Forum  General Chevy 4x4 & SUV ForumFeedback & Testing ------  Problems, Questions, Suggestions4x4Wire Staff ------  Forum Moderators  Problem Threads Print Thread Switch to Threaded Mode 5 Excellent 4 Good 3 Average 2 Bad 1 Terrible View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts

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