Question about 1999 Mitsubishi Montero Sport

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Montero O2 sensor

Who is SNG-02
What about the sensors I listed?

No good or N/A ?

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  • leooostra Jul 28, 2008

    Yes the fix is a good one! and also the best price!

    Thanks for the advise.



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The SNG-oxygen sensor is the brand of the SN4-123 which is good.

the MR988905 is too expensive since it is like an oem from mitsubishi which is best for an Acura, a little mix up there, but regardless, i'de go for the SN4-123, the last on the list you posted.

Posted on Jul 16, 2008


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O2 Sensor defect

MR988905 costs $300+

SNG O2 sensor is just below $100

they may claim being made with the same quality and both are tagged "direct fit" for easy installation.

its just my idea, good luck.

Jul 16, 2008 | 1999 Mitsubishi Montero Sport

1 Answer

Mitsubishi Montero '02. Just had the O2 sensor replaced and the light came back on showing Code PO431 catalytic converter Bank 2. They say it'll cost me at least $1000 to fix it. Is this correct? Anyway...

their are 2 O2 sensors one before the cat and one after ,try changing the other one first before you go to a new cat which is expensive to say the least

Dec 28, 2010 | Mitsubishi Montero Cars & Trucks

1 Answer

How do you change the O2 sensors?

The oxygen sensors, or O2 sensors, on a Mitsubishi Montero Sport are located under the vehicle. Models made prior to 1996 had only one sensor which was located on the catalytic converter, behind the exhaust manifold. Newer models have additional sensors located on the left and right sides of the manifold.

Sep 28, 2010 | 1999 Mitsubishi Montero Sport

1 Answer

Which O2 sensors relate to error codes PO130 and PO135

P0130 - O2 Sensor Circuit Bank 1 Sensor 1
P0135 - O2 Sensor Heater Circuit Bank 1 Sensor 1

Here is a visual aide that will clear up the confusion on where the affected sensor is located.

Aug 04, 2010 | 1999 Mitsubishi Montero Sport

1 Answer


The error code should tell you which bank and sensor you are looking for. with that information:

bank one on a montero sport is on the passengers side.
bank two is the drivers side.

sensor one is before the converter,
sensor two is after the converter.

each bank has two sensors. on each bank there is a sensor with a black and a gray connector, and no they will not interchange. connectors are different.

besides disconnect the actual o2 sensor, you can just disconnect the plug to be sure you got the right one. the plugs are hidden in the sides, just follow the cables. you could disconnect the plug of the one that you thing is the wrong one and check again the error code to see if you are getting the same error. if you are getting a different one, then you disconnected the wrong one.

good luck with the change. some wd40 or liquid wrench will help with the removal of the sensor.

Apr 19, 2010 | 2000 Mitsubishi Montero Sport

1 Answer

I have 2002 mitsubishi montero sport 3.5L with a check engine code for O2 sensor no circuit activity Bank 2 Sensor 1. Any Help?

replace the o2 sensor the one before the cat converter with a quailty sensor like a denso brand o2 sensor

Apr 08, 2010 | 2002 Mitsubishi Montero Sport

2 Answers

Non-california emission O2 sensor for other 49 states

Probably not. The California car is all together different. Usre the Cal, O2 Sensor.

Nov 11, 2009 | 2000 Toyota Camry Solara

2 Answers

Low Idle and O2 sensor replacement on Montero

The O2 sensor is mounted to the exhaust; you'll need to get under the truck (jack-stand please) to locate. If it sits where a 89-92 sits it will be in the exhaust under the passenger side. Follow the wiring, on most it carries over the transmission to a wiring block under the driver's sie of the truck (again this is all under the truck) As for the low idle I do not believe there is anything to be change. If the idle is low it is due to other conditions... injectors, sensor, low compression, timing or such.
I hope this may have helped,

Jul 02, 2009 | 1996 Mitsubishi Montero

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