Question about Mitsubishi Eclipse

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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

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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

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Posted on Jan 02, 2017

mcalkins3
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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

warlock61
  • 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

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