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Upstream o2 sensor - 2003 Toyota Camry

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6ya6ya
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Posted on Jan 02, 2017

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  • 1915 Answers

SOURCE: MULTI CYL. MISFIRING P302,P304,P306,P301,O2 SENSOR

First, it has to be running really bad with all those misfire codes-so look for basic issues first, an unplugged harness at the MAF, MAP, ignition module, even a bad battery connection-did this happen suddenly? Are you sure you have good compression, or even that it is correctly timed, that is the timing chain/belt hasn't 'slipped'? The O2 sensor issue is probably just because it is reading so much fuel that it is completely incapable of adjusting spark and fuel-you have to have a basic problem...look at issues one-by-one, harnesses, vacuum hoses disconnected, good electrical connections starting at the battery, look at the top of the engine for excess fuel (damaged/leaking fuel regulator?)-

Posted on Mar 10, 2011

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ameezle
  • 100 Answers

SOURCE: where is 2003 avalon o2

Hi, the sensor is on the front exhaust manifold. Here is a picture of the sensor you need to replace..... You should be able to replace it yourself.
ameezle.jpg

Posted on May 31, 2011

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2 Answers

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Jan 26, 2016 | Cars & Trucks

1 Answer

Found out I'm missing drivers side upstream o2 downstream was there some help to find the missing wire be awesome


So what kind of help are you looking for?
Year make and model would be helpful for any information.
Some vehicles only have one upstream and one downstream O2 sensor. Older vehicles only have upstream O2 sensors

Apr 19, 2015 | Cars & Trucks

1 Answer

Can an O2 oxygen sensor effect another sensor and give a false reading?


Check which side of your engine has cylinder #1. That side is bank 1. Bank 2 is the side opposite of bank 1. So bank 2 is not always passenger side. And since you seem to have extra O2 sensors, I would replace the other upstream and see what happens. Also the mass air sensor can give a trouble code issue to the upstream 02 sensors. Good luck. I've struggled thru this myself.

Mar 06, 2015 | Cars & Trucks

2 Answers

2000 navigator system too lean


Too Lean on which Bank of the Motor?

To have a lean O2 Code --you could have a rich fuel
condition & the pcm drove the fuel trim lean

Next you could have a vacuum leak-in the intake or exhaust system

Third you could have a failed O2 Sensor

Front or Upstream Oxygen Sensors get replaced at 100,000 miles

The front sensors are on the exhaust pipe between the motor &
the converter.

Will need a long handled flex head O2 Sensor Wrench

Mar 17, 2014 | 2000 Lincoln LS

1 Answer

Upstream heated O2 sensor heater fault


check the fuses if the fuse blew the heated side of the sensor will not work and still kick the code also a v-6 has 2 upstream o2 sensors

Oct 01, 2012 | 1997 Mercury Villager

1 Answer

How many oxygen sensors are there on a 1996 ford explorer 8 cyl., 4.0 eng.


The answer depends on the type of exhaust system you have. You will have either 3 or 4 total O2 sensors on your V8. If you have single exhaust with a single catalytic converter then you will have 3 O2 sensors (2 upstream sensors & one downstream sensor - "up or down stream" meaning before of after the catalytic converter). If you have either dual exhaust and/or two catalytic converters then you have 4 O2 sensors (2 upstream & 2 downstream). If you have an MIL light (malfunction indicator light, or "check engine light") the code will indicate "front bank / bank one", which is one of the 2 upstream O2's before the catalytic converter(s), or "rear bank / bank two", which is one of the O2's after the catalytic converter(s).

Apr 22, 2012 | 1996 Ford Explorer

1 Answer

My 2002 ford e-150 is pulling p1131 code and p1151 code what is the problem


Lack of upstream heated O2 sensor bank 1 & bank 2. I would first check for broken or corroded wires to both upstream O2 sensors. If no apparent bad wires O2 sensors are bad.

Oct 11, 2010 | Ford E-150 Cars & Trucks

2 Answers

Exact location of downstream O2 sensor.


Downstream O2 sensor is after (downstream) the catalitic converter on the exhaust pipe. Upstream O2 sensor is after (downstream) the engine exhaust manifold - before (upstream) the catalitic converter. Upstream O2 sensor controls air-to-fuel ratio to yield a small excess oxygen. Downstream O2 sensor assesses the catalitic converter performance.

Sep 22, 2009 | 2003 Pontiac Vibe

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

2 Answers

Check engine light


Sometimes can be prematurely dirty air filter, sets off the air flow sensor, which sets off the o2 sensor. So might try new air filter first and erase codes and then see, before you spend more bucks than you need; then if codes return, do the flow mix sensor.

Apr 19, 2009 | 2006 Honda Civic Hybrid

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