Question about 2001 Mercury Villager

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We have changed 2 o2 sensors on our mercury villager 2001 but when checking computer the codes p138 and p139 still come up

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  • yadayada
    yadayada Mar 21, 2011

    What is the fuel pressure? you have wasted your money, one O2 sensor showing a fault is almost always the sensor, two and it is some other problem, you need to have a dealer scan the system with a live data NGS scanner

  • Anonymous Mar 16, 2014

    high voltage p138 shows up

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Sometimes you have to go through a drive cycle before the light goes out. This may be a 50 mile duration.

Posted on Mar 21, 2011

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Check the electrical connectors which connect to the O2 sensors for corrosion and improperly high resistance.

Posted on Mar 21, 2011

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Did you clear the previous codes? You need to reset - then if they come back on it means cat. converter needs to be replaced. Those 2 sensors 1pre & 1 aft converter are supposed to see two different 02 readings - if they read the same converter is not working.

Posted on Mar 21, 2011

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1 Answer

2002 mercury villager code po325 code po138 code po139


P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
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think you just need a new o2 sensor

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Upstream heated O2 sensor heater fault


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O2 sensor replacement can't locate it on the downstream 2001 murcury villager


The downstream sensor will be AFTER the cat. It may be on the top of the exhaust pipe and hard to see. As a rule it is close to the convertor.

Oct 11, 2011 | 2001 Mercury Villager

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Codes P0325 codes P0141


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You're problem is in Bank One, more than likely an O2 sensor...I'd go to AutoZone or your parts store and ask for a print out on these codes.

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How many oxygen censor in 1997 mercury villager van I have to change new one some one told me more than two censor problem is check engine light is on


I have a 1997 Mercury Villager with many miles. We get poor gas mileage. The check engine light is on. I want to replace the 02 sensor but cannot locate it on the engine. Is there a link with photo of physical location of the sensor and what are the steps to replace it?

Oct 19, 2009 | 1997 Mercury Villager

1 Answer

Plz help


could be broken heater wire for O2 sensor. go here for files and pics for villager

http://groups.yahoo.com/group/villagerquest/

Jul 09, 2009 | 1997 Mercury Villager

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What it means p1166 and p1167 on a mercury villager 99


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98 mercury villager OBD I code P0135


This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.
Repair short or open or high resistance in wiring harness or harness connectors.
Since you have already changed out your O2 sensor (as long as you used to OEM replacement and not the "Universal" replacement) you should not have to replace it again. You might check your thermostat to part of the time it takes for the O2 sensor to start switching being based on coolant temp, if your thermostat is not operating properly, it could cause the coolant temp to take longer than what is considered by the ECM to be normal.

Feb 22, 2009 | 1998 Mercury Villager

1 Answer

O2 Sensor Bank 1 Sensor 2


That is the O2 sensor right behind the cat. converter. When the cat is clogged it can shoot contaminates in the O2 sensor so sometime just cleaning the sensor will make it work again, if not it will need to be replaced. Mark - ABKS

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