Question about Mitsubishi Eclipse

1 Answer

Hello, I have a 2000 Mitsubishi Eclipse GT V6 3.0 that the service engine light soon has come on. A mechanic put his diagonistics machine on it and the error code P0135 - Heater circuit, bank 1 sensor 1. I got a new O2 sensor from a friend that works at Mitsubishi that used my VIN to ensure correct part. I changed the O2 sensor on the top of my exhaust manifold. There is also a lower one and one near the firewall more on the left side pf the engine as you stand in front of the car. For the code, is this correct? Which is the sensor for Heater circuit, bank 1 sensor 1? your assistance is appreciated. Lawrence Serrano

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Mitsubishi Master
  • 52,016 Answers

It is not an O2 sensor but a heated oxygen sensor that is in the exhaust manifold before the cat converter
heated oxygen sensor(HO2S) 1 bank 1 is the one against the fire wall
it is not a heater as such but has an internal heating system so that it reads the exhaust emissions correctly and adjusts the air /fuel settings in the ECM
normally has 4 wires
the oxygen sensor (O2S) is after the cat converters and is a completely different sensor to read a different exhaust gas

Posted on Apr 12, 2017


6 Suggested Answers

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 123 Answers

SOURCE: diagnostic code p0135

What engine is in this vehicle? I assume the avalon would be a 3.0L or similar V6 engine. Bank 1 sensor one indicates one of the primary O 2 sensor controlling a/f ratio. Sensor one bank one would be the sensor located in the Front manifold, closest to the engine. Hope this solves your issue. I would first check the conector at this sensor for corrison before buying a new sensor.

Posted on Sep 29, 2008

  • 659 Answers

SOURCE: more 99 cougar problems

there is a fuse for the o2 heaters if one of the sensors blew the fuse they will all be out

Posted on Mar 01, 2009

  • 6982 Answers

SOURCE: P0155 & P0135

O2 sensors are tricky. sometimes like anything else they fail. many times though the exhaust mixture they encounter is out of their range and that shows up as a failure.since you seem to have no other problems , I would go ahead and change them, but don't be disappointed if the code shows up again (at least you know it's not the sensors.) I don't like using the process of elimination when doing repairs but sometimes you must.

Posted on Mar 16, 2009

  • 135 Answers

SOURCE: Where is bank1 sensor 1 (O2 sensor) of 2003 Mitsubishi Eclipse

if its a 4 cylinder it will the 02 sensor closest or if not in the exhaust manifold

Posted on Aug 05, 2009

  • 77 Answers

SOURCE: I have a 2000 mitsubishi eclipse with a check engi...

A dirty carbon canister (part of the egr system) caused by topping off your gas tank can cause this. Try not topping off your gas a few times to see if it will go out. You may have to reset the engine computer, to do so, unhook the battery for at least 20 seconds. (after you haven't topped off your gas a few times if the light doesn't go out automatically)
Make sure you have any security codes or radio codes before you do this.
If it doesn't go out then the O2 sensor in that bank will have to be replaced again. If you replace it again, do not top off your gas tank.
Make sure you use the correct heated sensor, some places sell universal ones that do not work right, or in some cases at all.

Explanation: Topping off your gas (overfilling) can cause raw gasoline to run into the egr system causing all kinds of problems on some models. In some cases, raw gas can run into the exhaust when the engine is warming up, over time, damaging the front O2 sensor/s. When the gas pump stops, do not add more to attempt on getting the most gasoline in your tank.

Posted on May 21, 2010

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Service engine soon light on 2003 mitsubishi eclipse spyder

If you want to fix it yourself take it to an auto parts store they have code readers that diagnose what set it off. If your not sure about it take it to a mechanic.

Feb 14, 2012 | 2003 Mitsubishi Eclipse Spyder

2 Answers

Picture diagram for 2000 eclipse spark plug to distributer

According with engine sizes, check this for 2000 Mitsubishi Eclipse GT 3.0 liter SOHC V-6


or 2000 Mitsubishi Eclipse GS 2.4 liter SOHC L4


Hope helps.

Apr 29, 2011 | 2000 Mitsubishi Eclipse

1 Answer

How do I reset my service engine soon light on my 2000 Eclipse GT?

The light can be extinguished by accesing the computer with a diagnostic code reader however just resetting the light does not address the problem that caused it to come on.
Take it to Autozone, they can read the error and tell you what it is and reset it for... for free

Jan 02, 2011 | 2005 Mitsubishi Endeavor

1 Answer

Service engine light on 2000 mitsubishi eciplse GT V-6

This could be as simple as a loose or defective gas cap. Beyond that you will need to retreve the codes with an O.D.B. II code reader.

Mar 28, 2010 | 2000 Mitsubishi Eclipse

1 Answer

Change a crankshaft position sensor on a 2000 eclipse

Is this a V6 or 4cyl???>>>(V6) This requires removing the Harmonic balancer (crankshaft pulley). Remove (R) front wheel, remove engine splash Guard, Remove crank pulley, remove lower timing belt cover. The Crank sensor is located behind the crank shaft pulley!! I highly recommend having this done by a certified tech, requires special tools. Hopefully this helps!!

Mar 11, 2010 | 2000 Mitsubishi Eclipse

1 Answer

Replace oil pump

just on labor for the 3.0 liters it takes about 7.0 hours

the oil pump around 300.00

Feb 20, 2010 | 2000 Mitsubishi Eclipse

1 Answer

2003 Mitsubishi Spyder Eclipse, green wrench/car lt, not running

that means it needs service. also probly means that something is either loose or broken wise. you were probobly receiving a service engine soon signal when you put the keys in the ignition and turn it one slot to where the car is running on battery so the radio should work. and thats where the idicators would of been going on. and you probobly didnt notice those

Aug 07, 2009 | 2003 Mitsubishi Eclipse Spyder

2 Answers


it of probably the piston rings oil is getting past the rings and has no place to go but out the exhaust

Jun 23, 2009 | 2000 Mitsubishi Eclipse

1 Answer

Service Engine Soon Light

take it to a garage and ask for a diagnostics check

Jun 16, 2009 | 2000 Mitsubishi Eclipse

4 Answers

2002 mitsubishi service engine soon light without any problems

If you take your vehicle to a local autozone or advanced auto parts they are able to read the code for free and tell you in rough estimation what may be wrong, base your desicion on what they have to say

Nov 27, 2008 | 2002 Mitsubishi Eclipse

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

120 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts


Level 3 Expert

81285 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

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

Answer questions

Manuals & User Guides