Question about 2001 Mitsubishi Galant

1 Answer

I have a 2001 Mitsubishi galant and I just had the upstream and downstream oxygen sensors replaced and the check engine light is still on what's the problem?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Mentor:

    An expert who has written 3 tips or uploaded 2 video tips.

  • Expert
  • 245 Answers

Unhook battery cable for 10 minuets this will resets computer .

Posted on Feb 15, 2012

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
blueextc3221
  • 15935 Answers

SOURCE: 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.

Posted on Mar 05, 2009

  • 333 Answers

SOURCE: How do I replace the oxygen sensors in my 2003

If you have a 4 cylinder, all sensors can be accessed from the ground. They are mounted above and below the exhaust manifold, in plain sight.

If you have a V6, the bank 1 sensor 1 and bank 2 sensor 1 can be accessed from the ground, they are located at the top of each exhaust manifold. Both sensor 2's (the ones after the catalytic converters) must be accessed with the vehicle lifted.

To change the sensors out, a proper O2 sensor socket is desirable. If one is not available, the sensor nut is 22mm, but you may have difficulty getting a wrench to work in the limited space available.

I only recommend genuine Mitsubishi/Denso sensors, as they are just plain more reliable. If you do buy aftermarket, be sure they are complete sensors, not cut and splice sensors.

You can unhook the negative battery cable for 5 minutes to reset the light, or use a scantool (Autozone and similar will often reset your light for free).

Posted on Oct 22, 2009

  • 2 Answers

SOURCE: 2001 mitsubishi galant shaking while in idle

Check your motor mounts, recently engine idled rough when in nuetral or stopped in drive, also jerked when put in reverse. took it to a automotive shop and found motor mounts cracked. Runs great now

Posted on Nov 13, 2009

  • 50 Answers

SOURCE: 2001 Galant: I replaced the fuel pump on my mitsubishi galant 2...

check fuel pressure

Posted on May 19, 2010

  • 1 Answer

SOURCE: I have a 1997 Mitsubishi Galant with rough idle

I am having the same issue on Mitsubishi Galant 02. Clattering on acceleration, herky jerky idle. Pulled a code multiple cylinder misfire. My mechanic's diagnosis is bad valve cover gasket causing oil to seap into the spark plugs and bad timing belt, which I have not replaced at 150k miles. I do however know my fuel injectors do need cleaning, he hasn't ruled that out either. Have you pulled any code on it? I have read on engine knock sensor going out on some of these also. Hope this helps some.

Posted on Oct 22, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Code p0420 acura m'dx


1996-newer (OBD-II) vehicles use oxygen sensors and a catalytic converter to reduce emissions. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). When the engine is warmed up and running normally the upstream oxygen sensor reading fluctuates and the downstream one is fairly steady. In the case where both readings are fairly steady, a P0420 check engine light code is set.
Possible Causes: Oxygen (O2) sensor not working correctly
Damaged or leaking exhuast (pipe, manifold, catalytic converter)
Damaged catalytic converter
Diagnostic Help:
To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. The front reading should vary, the rear should be steady. Replace as necessary. Check the rear Heated O2 Sensor. Check the catalytic converter, replace if necessary. If necessary, check for wiring and component concerns. See our article "Automotive Circuit Testing 101", if you need more assistance with this. Remember to refer to an model-specific repair manual for proper instruction.

Jan 20, 2014 | 2005 Acura MDX

1 Answer

What is the best way to remove O2 sensor bank 1 sensor 2?


Here is the low-down on oxygen sensors, and their location designations explained:

Oxygen sensors are screwed into the exhaust system at various points. Some people say that there are 4 oxygen sensors, but technically, that is not correct. Only the front 2 are considered oxygen sensors.

These oxygen sensors are screwed into the exhaust pipe or directly into the exhaust manifold, one on each bank. Because they are in front of the catalytic converter, this is often referred to as 'upstream'.

The other 2 are actually called catalyst monitors. They are oxygen sensors, but they serve a different purpose. They monitor the activities of the catalytic converters, thus the name, catalyst monitors. They are screwed into the exhaust one on each bank, after, or downstream, of the catalytic converters.

On a 4 cyl engine, there are only a total of two such sensors, the one in front of the catalytic converter is the O2 sensor, the one behind the cat is the catalyst monitor.

The location names for them are as follows:
  • On a 4 cyl, the front / upstream is called "bank 1 sensor 1" and the rear / downstream sensor is called "bank 1, sensor 2."

  • On a V6 or V8 engine:

    • the passenger side bank on a forward facing engine, or the bank closest to the firewall on a transverse mounted engine, is bank number 1, so the forward / upstream sensor on that bank would be "bank 1, sensor 1."

    • The driver's side bank (forward facing mount engine), or front bank (transverse engine) would be bank number 2, thus the forward / upstream sensor on that bank would be "bank 2, sensor 1," and the rearmost / downstream sensor on that bank would be "bank 2, sensor 2."

Jul 28, 2012 | 2004 Mitsubishi Endeavor

1 Answer

2001 Toyota Sequoia Oxygen sensors


No the wires won't likely be the same length

The front upstream sensors, are not the same
Part # as the rear,downstream monitor sensors

Go to Rock Auto.Com & look up your oxygen sensors
I would get the NTK or Bosch,if they have that

You do not replace the rear sensors, until they fail

You replace the front ones at 100,000 miles or sooner,
if they fail

Jun 02, 2012 | 2001 Toyota Sequoia

1 Answer

How any oxygen sensors are on a 1999 grand cherokee laredo 4.0 & were is it/they located?


On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

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, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Check Engine Light came on. Had a dianogistic check indicating faulty Oxygen Sensor. Exactly where is the sensor located...was told 'upstream or downstream' of catalyic convertor. Accessible from under...


Oxygen sensors are located in your exhaust usually 2 - 1 upstream (in front of cat.converter) 1 downstream (behind cat.converter) and from under the vehicle.

Mar 15, 2011 | GMC Yukon Cars & Trucks

2 Answers

What sensor (upstream?downstream) is the P0154 code referring to?


P0156 code means :Oxygen Sensor Circuit No Activity Detected (Bank2, sensor1) I'm not sure but i think it's on the exhaust manifold!!! protuha_31.jpg

Feb 11, 2011 | 2001 Mitsubishi Montero Sport 4WD

1 Answer

2001 buick regal w/ bad ignition coil and clogged catylitic conv.


Hello! The defective ignition coil more than likely contaminated the downstream O2 sensor...If there isn't a trouble code and engine performs in a normal fashion, there's no reason to change the upstream sensor...

Guru........Saailer

Aug 03, 2010 | 2001 Buick Regal

2 Answers

How many oxygen sensors in a 2001 chrysler sebring 3.0


17c3292.jpg

Fig. Heated Oxygen (HO2S) location (sensor 1)-2.4L engine

db6f426.jpg

Fig. Heated Oxygen (HO2S) location (sensor 2)-2.4L engine

99e413c.jpg

Fig. Heated Oxygen (HO2S) location (bank 1, sensor 2) (bank 2, sensor 2)-2.7L engine

e2a250f.jpg

Fig. Heated Oxygen (HO2S) location (bank 2, sensor 1)-2.7L engine

I hope help you with this (rated this help). Good luck.

Sep 09, 2009 | 2001 Chrysler Sebring

1 Answer

Replace oxygen sensors


these engines have 1 upstream o2 sensor and 1 downstream o2 sensor..the 1 in the rear exhaust manifold is the upstream and the 1 after the converter is the downstream..make sure you replaced the right one

May 15, 2009 | 1998 Plymouth Grand Voyager

1 Answer

Engine code p0421


Catalyst System Efficiency Below Threshold (Bank 1)

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

A code P0420 may mean that one or more of the following has happened:

* Leaded fuel was used where unleaded was called for
* An oxygen sensor is not reading (functioning) properly
* The engine coolant temperature sensor is not working properly
* Damaged or leaking exhaust manifold
/ catalytic converter / exhaust pipe
* Retarded spark timing
* The oxygen sensors in front and behind the converter are reporting too similar of readings


To Do list

* Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
* Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
* Inspect the downstream heated oxygen sensor (HO2), replace if necessary
* Replace the catalytic converter

Jan 04, 2009 | 2001 Hyundai Sonata

Not finding what you are looking for?
2001 Mitsubishi Galant Logo

688 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Mitsubishi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...