Question about 2005 Jeep Wrangler Unlimited
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Posted on Jan 02, 2017
SOURCE: PO137, PO 138 codes
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
douple ck all the ground wiresto engine,trans bell housing ,battery or frame/firewall look for any that may have separated from any pack of wires or broken off eyelets then thightnen all points,,.these grounds are very important to comp/injection controls and can cause a multi code problem like yours.
Posted on May 07, 2009
SOURCE: oxygen sensor confusion
1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.
Posted on Aug 10, 2009
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SOURCE: Scanning codes
Code p0139 is a problem with the REAR oxygen sensor on the drivers side. Tho problem is caused by one of the following...
The Exhaust system is leaking
The Wiring to the sensor is damaged
The Sensor itself is faulty
Hope this helps you
Best of luck..
Posted on Oct 18, 2009
bank one sensor 1 is the bank of cylinders that number 1 spark plug is located in, bank 2 the other side, this assumes u have a V8, the sensor one location is the sensors that are BEFORE THE CATALYTIC CONVERTER, the sensors referred to as sensor 2 are after the ones AFTER THE CATALYTIC CONVERTER IN THE EXHAUST SYSTEM.
Posted on Apr 28, 2010
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