Question about 2001 Mazda Tribute

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Mondeo st24 v6 2544cc w reg....P1151 fault code...Does anyone know if it's the front or rear bank o2 sensor at fault? Thank you.

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  • Contributor
  • 23 Answers

Front bank/or it can be a intake or exhaust leak

Posted on Nov 22, 2013

Testimonial: "Thank you for the reply it has helped a lot...If there is a problem with the intake would both the sensors be flagged up by the ecu/pcm? or do the intake pipes run independently on each bank? ...Also, if there is a leak in the exhaust, is it as simple as asking someone to put their hand over the end of the exhaust so i can hear any leaks around that bank,or will it need special tests? hope that makes sense...Thanks once again."

  • samps1973 Nov 22, 2013

    Thank you for the reply it has helped a lot...If there is a problem with the intake would both the sensors be flagged up by the ecu/pcm? or do the intake pipes run independently on each bank? ...Also, if there is a leak in the exhaust, is it as simple as asking someone to put their hand over the end of the exhaust so i can hear any leaks around that bank, or will it need special tests? hope that makes sense...Thanks once again.

  • Brent Tischer Nov 23, 2013

    no it wont show different code /yes you can put hand over the tailpipe

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  • Mazda Master
  • 2,425 Answers

I know one thing for sure...

A lot of OXYGEN SENSORS get replaced for NOTHING...

and the NEW ONES report the very same issues ...

I would suggest you check your catalytic converters
and mufflers ... (blocked exhaust)

They will strangle a motor... very effectively and
many OXYGEN sensors have been needlessly
sacrificed along the way...

I'm just saying...

Carnac the Magnificent

Posted on Aug 16, 2017

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Posted on Jan 02, 2017

emissionwiz
  • 75222 Answers

SOURCE: Fault code P0133 can't pass inspection.

This code does not always mean the O2 sensor is low, but if u want to replace it here is the info to do that and the part number.

The sensor you want is the one in the exhaust pipe of the engine cylinder bank that has #1 cylinder in it, as you face the engine with the hood open the cylinder bank u want is the rear bank, u will need to jack the car up and get under it to remove the sensor, u may also need a special socket to remove it, the sensor is the one that is before the catalytic converter. part number is:DENSO Part # 2344068
REAR; Before Catalyst

Posted on May 20, 2009

toneman2121
  • 775 Answers

SOURCE: Where is Bank 1 Sensor 2 located on a 2004 Mazda

bank 1 is the bank of cylinders closest to the firewall. the sensor will be located along the exhuast from that side after the catylitic converter

Posted on Apr 01, 2010

citroenchris
  • 600 Answers

SOURCE: The dealer says I need O2 sensors in position Bank

Yes there are 4 sensors, one on each bank of your V6 above the catalytic converter and also a pair below the cats, maybe you should find an independent garage to put the Mazda on their code reader and find out the whole picture, my reader cost $300 and is low end but gives all the info on each O2 sensor (and all other sensors) in real time so I can see how many are going off spec and need changing. Dealerships work to manufacturers reccomendations and guidelines so probably have to change the pair.

Posted on May 02, 2010

tunde007
  • 2382 Answers

SOURCE: Mazda 626 (Capella) ABS fault. I

Hi,
Code 44
Oxygen sensor voltage was under 0.25 volts for up to 4 1/2 minutes of closed loop operation, lean exhaust. Check the ECM wiring connections. Check for vacuum leaks at the hoses and intake manifold gasket.

Code 48
Misfire Diagnosis. Check the ignition and fuel systems.

Posted on Jan 31, 2011

  • 14036 Answers

SOURCE: I need to know which O2 sensors are which: Bank 1

bank one upstream oxygen sensor on exhaust manifold bank two oxygen sensor after catalytic converter.tell me what code you are getting.bank 1 sensor 1 fuel system is too rich fuel pressure too high fuel pressure regulator leaking or more than 1 fuel injector leaking. fuel contaminated.check spark plugs if black carbon color fuel system too rich. if you getting code bank 1 sensor 2 check for air leaks in the exhaust system, air leaks intake manifold.look for vacuum lines leaks,look for vacuum leaks pcv valve and hose and make egr valve not stuck open or gasket leak.

Posted on Apr 15, 2011

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1 Answer

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Try cleaning the MAF sensor first, then check for any unmetered air getting into throttle body (leaks in intake hose). Bank 1 is the driver's side of the engine (or front on FWD) and bank 2 is the passenger side.

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P1151 is indicating an problem with the upstream O2 Sensor on Bank 2. Bank 2 is the even cylinders side O2 sensor. The P0175 code indicates a rich condition in Bank 2 exhaust. This indication, if by itself, would indicate a faulty MAF Sensor or a vacuum leak, but since you already have the P1151, change the Bank 2 O2 sensor first and most likely both codes will clear.

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Error code P1131 & P1151


Hope this helps you or future parties of intrest. P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1 P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2 I would get under your stang and gently clean outside portion of o2 sensors using a scotch brite. Also if you have so dielectric grease pull electrical connections to o2 sensors clean them and add grease. These trick eliminated the o2 sensor OBD1 codes on my 1987 Ford mustang gt

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I have a ford escape 2001 GLS but muy check engine light is on and i get the codes but i dont know the mean these are the codes p1151 and p0155


Hello! Both faults are pointing at the same Oxygen Sensor...Upstream Bank 2...Meaning in the exhaust header before the Cat. converter on the right side of the engine...O2 sensors generally cause a P-code as an effect rather than a cause...But in this instance it's a defective O2 Sensor...Replace...

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My 2002 ford e-150 is pulling p1131 code and p1151 code what is the problem


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1998 mercury sable wagon with the V6 Duratec engine getting a P1131 reading what is it


its running lean on bank 1, eitehr a vacuum leak, or an o2 sensor.

http://www.denlorstools.com/autoblog/2009/07/ford-p1131-p1151-fault-codes-30-dohc-o-2-diagnostics/

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2 Answers

2002 Ford Windstar Error Code P1131 And P1151


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2 Answers

P0136, P1131, and P1151 codes on Ford Expedition 2000 4.6L


Your auto has four O2 sensors. Two upstream and two downstream; With two banks. Bank 1, sensor 1...and bank 2, sensor 1 are the two upstream (exhaust manifold before the catalytic). Bank 1, sensor 2 and bank 2, sensor 2 (other side of catalytic)

Code 1131= upstream; bank 1..sensor 1
Code 1151= upstream; bank 2..sensor 1
Code P0136 (generic code) bank 1..sensor 2 (questionable)

I wouldn't spend the money to purchase 3 sensors. Highly unlikely all three are bad; Cost is about $40/ ea.
Since there isn't a code for the cat's themselves, I would suspect the O2 circuit is malfunctioning. The rough idle is another clue.


Take an ohmmeter set it on X10 scale and measure the resistance from engine to body and body to negative post on battery terminal. You should read zero ohms (full needle deflection). If you do go buy two upstream O2 sensors. If you read
open or a high resistance run two straps from eng. to body...and body to neg.batt. post.

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1 Answer

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