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Po 141 02 sensor heater fault (bank 1 sensor 2) what does this mean and where do i have to look for it

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  • R M
    R M Oct 04, 2010

    How about a Make and Model on that? That would be very helpful

  • lineaso Oct 06, 2010

    nissan ques 2001

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OK, you have 2 Oxygen sensors on your vehicle. They are both mounted on your exhaust. You have one in front of the catalytic converter(Bank 1 - Sensor 1) / Then you have another after the catalytic converter (Bank 1 Sensor 2). Make sure they give you the correct Oxygen sensor at the parts store because they are different. Napa Part # DEN 2344701 for the DENSO one that is after the catalytic converter. You will see it sticking out of the exhaust pipe right after the catalytic converter - with wires and a plug. When you replace it, make sure you don't drop the new one, or get ANYTHING on the sensor Tip - there will be some anti-seize on the threads, make sure you don't wipe that off or get it on the sensor tip. You will need to have a 22mm wrench, or a 7/8 wrench which is a tad loose but works if you use it right - and they even make a deep socket with a slot in it for the wires just for Oxygen Sensors - I rarely use mine, because there never seems to be enough room for that socket. To loosen, bump the end of the wrench with your palm(wearing gloves) - or if you have a rubber hammer, you can tap the end of the wrench to loosen it. Applying steady pressure can cause issues, from rounding the edges of the bolt, to busting a knuckle - "bumping it" prevents all of that.
When you install the new one, be sure not to over tighten, snug will work great.

** Be sure to support your vehicle with properly rated jack stands, parking brake on, vehicle in park, and chock one tire - never rely on a hydraulic jack, or any jack for that matter.

If you need anything else, let me know.

Take care

Posted on Oct 06, 2010

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Please. Were is this bank 1 sensor 2 location. Please

Posted on Jan 28, 2012

  • Smith Williams
    Smith Williams Jan 28, 2012

    Please. Were is this bank 1 sensor 2 location. Please

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1 Answer

Wheret is the heater circuit?


P0155 is an O2 sensor heater circuit problem Bank 2 sensor 1. Replace the O2 sensor closest to the engine on the passenger side. The heaters are built into the sensor. No repairing them.

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What does code PO 140 mean


Yes, PO140: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2

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Has any one had problems with bosh oxagen sensor not working properly


Hi there:
Are you buy same or OE part replacement according with the Hyundai part number catalogue? This is important. Keep in midn that you need reset or delete all previous code stored in the car computer.


DTC P0131 - Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
Essentially the same as P0136 and P0137, a P0131 code refers to the first oxygen sensor on Bank 1. P0131 means the O2 oxygen sensor's voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL. Bank 1 Sensor 1 is located in front of the catalytic converter.


There may be no visible symptoms to the driver, other than the MIL (Check Engine / Service Engine Soon) illumination.


A code P0131 may mean that one or more of the following has happened:
- Faulty o2 oxygen sensor
- Short to voltage on O2 signal circuit
- High resistance or open on O2 signal circuit


Possible Solutions:
- Replace faulty sensor
- Repair short, open, or high resistance on o2 signal circuit


Now, about DTC P0135 - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)


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 wiring harness


Possible Solutions
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)


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Aug 17, 2012 | Cars & Trucks

1 Answer

Computer codes po-141, po-108,


p0141 Chevrolet HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction oxygen sensor bank 1 sensor 2
p0108 Chevrolet
MAP Sensor Circuit High Input
i would do the o2 sensor first

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My 95 eclipse is throwing codes 12, 31, 43, and 55 what do these codes mean?


12-cam shaft position Timing over retarded
31- HO2S heater Control Circuit Low (Needs a new O2 Sensor is what this is telling you)
43- HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
55- HO2S Heater Resistance (Bank 1, Sensor 3)
All of those assume they are supposed to be preceded by a P00

If you are getting ODBI codes these are teh definitions you are looking for:
Code 12 Air flow sensor fault
Code 31 Knock sensor fault
Code 43 EGR fault
Code 55 AV valve position sensor

These may make more sense with that year model.

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Error codes po 134 po 153 po 154 po 155 po 171 po 174


PO 134 = 02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR1)
PO 153 =02 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
PO 154 =02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2 SENSOR 1)
PO 155= 02 SENSOR HEATER CIRCUIT MALFUNCTION (BANK 2 SENSOR 1)
PO 171= SYSTEM TOO LEAN (BANK 1)
PO 174= SYSTEM TOO LEAN (BANK 2)
I WOULD SAY YOU HAVE FAULTY OXYGEN SENSORS CAUSING THE ENGINE TO RUN TOO LEAN REPLACE THEM AND YOU SHOULD BE BACK IN BUISNESS

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I OWN A 2002 DODGE INTREPID AND IT COMES UP WITH THESE CODES P0700,P0056,P0135,P0141,P0155,P0161 CAN YOU TELL ME WHAT THEY MEAN?


po700 is automatic transmission fault detected. poo56 is didnt see .po135 is upstream heated o2sensor heater circuit fault bank 1. po155 upstream heated o2 sensor heater circuit fault bank2.po 161 is downstream heated o2 sensor heater circuit fault bank 2.

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