Question about 1997 Mitsubishi Pajero

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What are the fuctions of oxygen sensors on the 1997 pajer V6 3500

Can they affect the iddling of thee engine.

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Upstream sensors ( before the catalytic converter ) are responsible for initial fuel air mix, and Down stream sensors are responsible for Carbon Monoxide levels as well as other emissions.

Posted on May 07, 2014


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1999 dodge durango oxygen sensors do notm correct Check Engine Light. Have been told there was a different harness available from Dodge also that an internal vacuum leak can cause this.

have the fault codes read
as the engine light also reports on transmission problems as well as the engine
changing oxygen sensors (O2) will not fix the problem as there is an heated oxygen sensor (HO2S) in the exhaust manifold that controls the air/fuel ration settings and that is affected by a vacuum /exhaust leak

May 31, 2017 | Dodge Cars & Trucks

2 Answers

Engine stall at iddle

Check for any cracked vacuum hose, Throttle clean it Check if you have any place sucking air.

Nov 22, 2013 | BMW 328 Cars & Trucks

1 Answer

How engine performance is affected by bad o2 sensor po138

Hey, The o2 sensor affects the fine tuning of the engine. it is used to tell how well the engine is burning off the fuel in the combustion process. if there is too much oxygen, then it will adjust the air/fuel mixture accordingly and vice versa. If the car runs too lean or to rich you will loose power and possibly damage your engine. It would be a good idea to replace if its faulty.


Dec 29, 2012 | 1997 Cadillac DeVille

1 Answer

Runs good when engine is cold, runs rough when engine heats up will a bad oxygen sensor cause this?

Generally no.
Oxygen sensors usually work or they dont .
If it was worn out usually you would see a change in fuel consumption.
It most probably is something being affected by the heat such as a cracked head which the crack will open up as engine gets hot.
It could also be from spark plugs and or leads breaking down, as overtime they are affected by heat.
other things affected by heat a electrical wires and connections,
Hope this was helpfull

Jan 12, 2011 | 1998 Plymouth Neon

2 Answers

Check Engine light is on but there is not a problem with the car

the check engine light also means there is a sensor telling the engine something needs fixiing :ie Repace oxygen sensor or something of this nature that does not affect the over all performance of the vehicle, maybe less to the gallon but thats about it.

Jul 23, 2010 | 1999 Chevrolet Cavalier

1 Answer

Just one more question if i disabled the catalyst as you told me, does this affect the functioning of the second oxygen sensor??

No the oxygen sensor is located in the exhaust manifold up stream from the converter lessening the back pressure will only make more movement of air and a cleaner burn from your engine to the sensor

Mar 01, 2010 | 1997 Toyota RAV4

1 Answer

Hi i want to know if its possible for me to remove and disable the exhaust catalyst (air cleaner) from my toyota rav4 1997 coz i think it is closed and my engine is working hardly especially on a up road....

you don't want to take the cat out because the oxygen sensor will make the check engine light to come on.
the up stream oxygen sensor is called air/ fuel ratio sensor, with out that one your engine will not run right

Feb 28, 2010 | 1997 Toyota RAV4

2 Answers

Where & how many oxygen sensors do I need for my 1997 Ford Ranger XLT Super Cab

Look before and after the catalytic converters. They will have wiring connected to them.

Apr 20, 2009 | 1997 Ford Ranger SuperCab

1 Answer

BMW 328 i 1997: Start up problems / Stuttering / Engine Light

change the pcv valve its under the intake manifold

Feb 18, 2009 | 1997 BMW 328

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