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Code po155 on a 2001 ford tarus. Where is the location of the o2 sensor... 3.0 single overhead cam

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Posted on Jan 02, 2017

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SOURCE: How do you replace an O2 sensor in a 2001 Ford

Be sure the exhaust is not extremely hot! I suggest using a good quality O2 sensor socket or a 7/8" flare nut wrench. These two will give you the best grip without slipping off. Once it loosens, slowly work it back and forth using a lubricant such as WD-40 or Liquid Wrench. This should keep the threads from being damaged, as they will be very rusted from extreme heat and weather. Take your time. Once removed, it is a good idea to use a thread chaser or cleaner to remove the remaining rust. It is a tool with the identical threads as the sensor. You could also use a tap of the same size. Someone you know might have one, unless you are friends with a mechanic at a good repair shop. Next, be sure there is anti-seize compound on the threads. There should be a sufficient amount applied from the factory. This will make the threads easier to tighten, and make the sensor easier to remove for the next time. Be sure there is no anti-seize on the portion that protrudes into the exhaust stream. It can foul and ruin a new sensor. Once you have threaded the unit into the exhaust pipe, tighten to specifications. DO NOT overtighten. The old threads can easily be stripped out. If you don't have a torque wrench, just tighten it as you would a sprark plug. It won't fall out. Plug in the sensor, and test drive to check your work. Also be sure there are no wires contacting the exhaust pipe.

Posted on Jul 18, 2009

  • 2049 Answers

SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape

B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter

You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks


Posted on Oct 20, 2009

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SOURCE: Where is bank 1 on a 2001 ford taurus?

If it was the upper o2 this is the one.This does not mean the o2 is bad,check the spark plugs and boots,and fuel pressure.The fuel ratio is not correct on that bank.

Posted on Apr 13, 2010

  • 76 Answers

SOURCE: where is the 2nd o2 sensor on a 1997 honda civic

One is just above the catalytic converter the 2nd is just past the cat. on down pipe.

Posted on May 04, 2010

  • 442 Answers

SOURCE: i cannot locate the crank

check side of engine block near oil pan

Posted on Oct 27, 2010

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