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2010 Mercury Mariner Check engine light won't go off. I get codes U0140, P0054 and P0141 where do I even start?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 373 Answers

SOURCE: check engine light is on..freze

Hi....
The code P0141... Is : Heated Oxigen sensor Bank 1 sensor 2
Is the sensor Located before of the catalystic.
Normalli this code come when the sensor is damaged. in short.
or Disconnected ON rare CASES ECM defective.
But I recomend clear the lights. and drive the car untill the light come back. if is the same code. Check the connections of the code if the connection is ok. REPLACE the sensor.

I hope this help on your problem....
Any ,more info. I wil help as soon as possible.

Posted on Jul 30, 2008

  • 160 Answers

SOURCE: P0135 and P0141 codes

possibly unplugged

Posted on Nov 12, 2008

emissionwiz
  • 75807 Answers

SOURCE: code # P0141 and P0138

You said you changed the O2 sensors, which ones? I do believe that sensor 2 is the Catalyst efficiency monitor, it looks like an O2 but it's function is different. This sensor is behind the Catalytic converter, the O2 is in front. Bank one is the bank that # 1 cylinder is on, so the sensor that is defective is the 2nd sensor back on that sides exhaust pipe.

P0141 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 2

P0138 - Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 1 Sensor 2

Posted on Nov 15, 2008

  • 28 Answers

SOURCE: 2006 mercury mariner. stupid tail light assembly.

they are hard to take off sometimes, you are doing it right just keep willing it it will come off, there is 2 gromits that hold it into place might have a little dirt into the plunger.

Posted on Feb 22, 2009

Molson02536
  • 3854 Answers

SOURCE: replaced both sensors in a 2004 Pontiac Grand Prix P0135 P0141

A code P0135 may mean that one or more of the following has happened: = O2 Heater element resistance is high
= Internal short or open in the heater element = O2 heater circuit wiring high resistance = open or short to ground in the wire harness. 
What to do; = Repair short or open or high resistance in wiring harness or harness connectors.
= Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
A code P0141 may mean that one or more of the following has happened:

Same as above: mentioned in P0135.
What do do is the same as above, so i am leaning towards and faulty wire harness since you have replaced both O2 sensors. Make sure the wire harness has no break in it or crushed connection clips. The other thing to look for is a bad fuse that is used to heat up the O2 sensor. It may not say O2 sensor on it, it may piggy back off something else so check all the fuse and make sure the O2 has a good ground and not corroded. Good luck and hope this helps. 

Posted on Jun 25, 2009

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Possible causes - Faulty Heated Oxygen Sensor Bank 1 Sensor 2
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