Question about 1998 Mitsubishi Montero

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I have a 98mitsubishi montero my check ingine light is on i hooked up my computer to read the code it reads bank 1/2 P0161oxygen sensor which oxygen sensor is the one on the driver side or passenger side

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Bank 1 is on the side that cylinder number 1 is on, and 2 is on the other . Look up your firing order and you should find it fairly easily. And sensor 1&2 refers to before or behind catylitic converter.

Posted on Mar 28, 2015

  • Lozano Junior
    Lozano Junior Mar 29, 2015

    Thank you very much for helping me out on my mitsubishi montero you guys were very helpful and my check engine light when off

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  • Mitsubishi Master
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Looking at the engine from the front it is the left side of the engine. It will be the sensor after the catalytic converter. Could be a faulty O2 sensor or a bad catalytic converter. Swap the two after cat O2 sensors over and if the fault changes to sensor 2/2 it will be your O2 sensor and if not it will be a bad cat.

Posted on Mar 28, 2015

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Service Engine soon light Code P0133

I just came from an Autozone, and then spoke with 2 Hyundai dealership service departments and they all three stated the P0113 code is the Intake Air Temperature sensor (IAT, also referred to as the Mass Air Pressure - MAP - sensor) on the engine, not an O2 sensor found in the exhaust system.

Posted on May 27, 2009

ghassun
  • 499 Answers

SOURCE: check engine light is on...bank 1 sensor1 oxygen sensor

if u have one oxygen sensor then u need to take a deep look at the bottom of ur car it will be somewhere at the Exhaust pipe if u have a catalytic converter then u will have two oxygen sensors one before the catalytic converter & the other will be after the catalytic converter. Note: the catalytic converter is located at after a little bit of beginning in Exhaust pipe.

Posted on Jun 06, 2009

emissionwiz
  • 76846 Answers

SOURCE: Replacing bank 1 sensor 2 and bank 2 sensor 1 oxygen sensors

BANK ONE IS THE REAR BANK OF CYLINDERS AND TWO THE FRONT BANK

Posted on Jun 24, 2009

  • 743 Answers

SOURCE: Check Engine light problem. P0431

O2 Sensor codes are usually in the P0130- P016x range.
P0431 is Warm up catalyst efficiency bellow threshold Bank 2
Don't know what you're working with so just figure bank 1 comes off the bank with the number 1 cylinder.

Posted on Aug 30, 2011

2strokeJim
  • 577 Answers

SOURCE: location of oxygen sensor bank 2 sensor 2 for gmc sierra 1500 v8

Bank 2 is the bank that is farther back than the other when looking at eng from the front you will see that one cyl head is farther forward (closer to radiator than the other. this is #1 Bank) #2 is the opposite and sensor #2 is the one after the Catyliac Convertor towards the muffler. #1 sensor is between head and Cat.

Posted on Feb 07, 2012

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2 Answers

P1133/oxegen sensor


MAKE SURE THE CONNECTIONS AT THE SENSOR ARE GOOD,ALSO CHECK FOR VACUUM LEAKS,HERE'S A LINK TO YOUR CODE,THE OLD SENSOR MAY BE GOOD,JUST A VACUUM LEAK, P1133 Chevrolet HO2S Insufficient Switching Bank 1 Sensor 1

Oct 17, 2015 | 2002 Isuzu Rodeo Sport S 3.2L V6 Hard Top

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Which Oxygen Sensor Is It?


There are many inquiries online about which oxygen sensor to change. Oxygen sensor failure codes are very common on a lot of vehicles. With all of today's vehicles having at least two oxygen sensors and many having three or four of them, it can be a little confusing as to which one is causing the problem.

Before we get into which sensor is which, we need to have a little discussion about oxygen sensor fault codes. There are several different types of oxygen sensor fault codes. Here are just some of the most common ones:

P0135 "Oxygen Sensor Heater Circuit Bank1 Sensor 1"
P0141 "Oxygen Sensor Heater Circuit Bank 1 Sensor 2"
P0147 "Oxygen Sensor Circuit Bank 1 Sensor 3"
P0152 "Oxygen Sensor Voltage High Bank 2 Sensor 1"
P0159 "Oxygen Sensor Slow Response Bank 2 Sensor 2"
P0171 "Oxygen Sensor Lean Sensor 1 Bank 1"
P0172 "Oxygen Sensor Lean Sensor 1 Bank 2"
P0174 "Oxygen Sensor Rich Sensor 1 Bank 1"
P0175 "Oxygen Sensor Rich Sensor 1 Bank 2"

There are many more possible oxygen sensor codes, but I only listed these to make my point. Many times the oxygen sensor code is NOT caused by the oxygen sensor itself. "Lean" or "Rich" oxygen sensor codes (i.e. P0171, P0174) are usually caused by something other than the oxygen sensor. Something is wrong, causing the engine to run lean (not enough fuel or too much air) or causing the engine to run rich (too much fuel or not enough air). In these cases, replacing the oxygen sensor will not fix a thing. (That is, unless you are trying to fix your bank account from having too high of a balance!) The new oxygen sensor will just set the same code as the original one. This is because the oxygen sensor is not CAUSING the problem, it is only REPORTING the problem.

High voltage codes (like P0152 above) can be caused by the oxygen sensor wires being shorted to another wire inside the wiring harness. Sometimes these codes are caused by bad grounds where some other component is trying to ground through the oxygen sensor circuit. Again, replacing the oxygen sensor will not fix this! In short, the problem needs to be diagnosed before running out and buying an oxygen sensor.

Just because a fault code has "Oxygen Sensor" or "O2 Sensor" or "O2S" in its description does not necessarily mean that an oxygen sensor needs to be replaced. Many do-it-yourselfers believe that all there is to fixing the car is to hook it to the "magic box", collect the fault codes and replace the parts the computer tells you to replace. There is nothing further from the truth.

Fault codes only point you toward which SYSTEM is failing. The system must be diagnosed to find the CAUSE of the failure. If this is not done properly, it will only result in wasting a bunch of your money. This is what you were trying to avoid by doing it yourself!

So, after reading all of the above, if you think you still want to replace an oxygen sensor, but don't know which one; here is how to figure it out:

Oxygen sensors are always numbered like this:

Bank 1 Sensor 1
Bank 2 Sensor 1
Bank 1 Sensor 2
Bank 2 Sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:

Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder #1 is located and, of course, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only one bank and it is always referred to as Bank 1. The exception to the 4 cylinder rule is on certain 4 cylinder engines (specifically, some Toyotas) there are two catalytic converters used. In this case, Bank 1 sensors will still be in the pipe for the catalyst that is connected to cylinder #1 and Bank 2 sensors will be in the other one.

Sensor 1 is always the "upstream" sensor (the one located BEFORE the catalytic converter).
Sensor 2 is always the "downstream" sensor (the one that is located AFTER the catalytic converter).
Sensor 3 refers to the ONLY "downstream" sensor where there are two sensors before the catalyst and only one after the catalyst. On very few vehicles the reference to this reads "Bank 1 Sensor 3".

If you do not know where cylinder #1 is, then you need to get a diagram of the firing order for your engine. Just post a question on FixYa.com and make sure you give the YEAR, MAKE, MODEL, and ENGINE SIZE of your vehicle and one or more of our experts will be happy to tell you how to find cylinder #1.

- DTTECH
ASE Certified Master Automobile Technician


Also check out this article by dttech: What Else Could Be Wrong?

on Apr 29, 2011 | Ford F-150 Cars & Trucks

1 Answer

Bank 2 sensor 1


You do not have to have the diagnostic light staying constantly on to have an issue with the car. It will be in the ECM's memory if any faults are present, as you said it had a couple of faults. Yes lack of power can be caused by a faulty Oxygen sensor . The only way to check is to hook up your scan tool and put it in live data mode and read the outputs of the sensor. If it's coming up Bank 2 then I take it, it has a Bank 1 sensor as well so compare it to that. Also take into consideration that fuel, spark or air leak can cause out of speck readings as well. Some cars oxygen sensors are the same for bank 1 and 2 so even swapping them around and re checking codes can be a great test. Cheers

Jan 06, 2014 | Cars & Trucks

1 Answer

Need to locate oxygen sensors 1 and 2


Bank 1 is driverside. Bank 2 is passenger side. Sensor 1 bank 1 is before converter. Sensor 2 bank 1 is after conv. Psgr side same

Nov 05, 2013 | 1999 Land Rover Range Rover

1 Answer

Code p0036


Possible causes
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)


Read more: http://engine-codes.com/p0036.html#ixzz2ib20bfW1

Oct 23, 2013 | Cars & Trucks

2 Answers

Check Engine light with Po131 o2 circuit low voltage sensor 1 bank 1 reading, what does that mean?


- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Replacing the O2 Sensor 1 usually takes care of the problem

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Feb 07, 2012 | 2004 Honda Odyssey

1 Answer

I have problem with code 1126 (toyota 4 runner 2001


Manufacturer Specific Codes

P1100
BARO Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1120 Accelerator Pedal Position Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1121 Accelerator Pedal Position Sensor Range/Performance Problem

P1125 Throttle Control Motor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1126 Magnetic Clutch Circuit

P1127 ETCS Actuator Power Source Circuit

P1128 Throttle Control Motor Lock

P1129 Electric Throttle Control System

P1130 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1133 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1150 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2)

P1153 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 2) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)

P1200 Fuel Pump Relay Circuit

P1300 Igniter Circuit Malfunction - No. 1

P1305 Igniter Circuit Malfunction - No. 2

P1335 No Crankshaft Position Sensor Signal - Engine Running

P1349 VVT System

P1400 Sub-Throttle Position Sensor

P1401 Sub-Throttle Position Sensor Range/Performance Problem

P1405 Turbo Pressure Sensor Circuit

P1406 Turbo Pressure Sensor Range/Performance Problem

P1410 EGR Valve Position Sensor Circuit Malfunction - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1411 EGR Valve Position Sensor Circuit Range/Performance - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1500 Starter Signal Circuit

P1510 Boost Pressure Control Circuit

P1511 Boost Pressure Low

P1512 Boost Pressure High

P1520 Stop Lamp Switch Signal Malfunction

P1565 Cruise Control Main Switch Circuit

P1600 ECM BATT Malfunction

P1605 Knock Control CPU

P1630 Traction Control System

P1633 ECM

P1652 Idle Air Control Valve Control Circuit

P1656 OCV Circuit

P1658 Wastegate Valve Control Circuit

P1661 EGR Circuit

P1662 EGR Bypass Valve Control Circuit

P1700 Vehicle Speed Sensor '2' Circuit Fault

P1705 Direct Clutch Speed Circuit Fault

P1765 Linear Shift Solenoid Circuit Fault

P1780 Park/Neutral Position Switch Malfunction (Only For A/T)

Back To Top Of Toyota Check Engine Light Codes Page

Mar 21, 2009 | 2002 Toyota 4Runner

1 Answer

How to change the bank 1 sensor 1 on 2002 mitsubishi gallant


it means the oxygen sensor closest to the exhaust man. is bad , replace

Mar 15, 2009 | 2002 Mitsubishi Galant

2 Answers

Need to know placement of heated oxygen sensor


The O2 sensors are located in the exhaust piping.
One (bank 1) is on the engine side of the Catalytic convertor.
Second (bank 2) is on the other side (exhaust end).

There are manufacturers that make universal fits that will go in either location. Be sure to specify the rear sensor when you go to the parts store.

It will look like this....

cfea0cf.jpg
It threads right into the exhaust pipe.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Mar 05, 2009 | 2002 Mitsubishi Montero

1 Answer

I own a 1999 Toyota Solara and the check ingine light is on. I have a n ODB code reader and it reads the code #P0135 heated oxygen senser circiut malfunctoin (bank 1, senser 1) I changed the oxygen senser...


Changing the O2 sensor for a P-0135? Use a TOYOTA sensor. The aftermarket/generic sensors do NOT work in Toyotas.

User with the smoking problem: Remove the valve cover & check for engine oil sludge where the cams ride. If it is sludged, a rebuild is necessary, BUT, Toyota DOES have warranty assistance for this issue. All you need are oil change receipts.

Jul 17, 2008 | 2007 Toyota Solara

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