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What does the upstream o2 sensor plug into - 2002 Toyota Camry

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6ya6ya
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Posted on Jan 02, 2017

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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
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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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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

2 Answers

I plug in a de-coder. It says, "P0133"


P0133 is a 'lazy' O2 sensor, bank one, side one-it is on the same side as number one cylinder and is in front (upstream) the catalytic converter. O2 sensors get 'lazy' or switch slowly as they get older die to deposits building on the tips or dirt around the outside of the sensor. On a scanner that does real time monitoring, you should see that it is switching between higher readings (.8-.9 volts) and lower readings (.1-.2 volts)-it is expected to perform these 'switches' at a certain rate and if the ECU (brainbox) determines that it is under-reporting, it sets the code. As a rule of thumb, an upstream O2 sensor should be replaced at 100,000 miles. This will assure better overall performance as the O2 sensors ability to monitor the engine is critical.

Dec 24, 2010 | 1996 Plymouth Voyager

1 Answer

I have replaced the o2 sensor the upstream one


i find most o2 problems aren't o2 problems they are fuel delivery problems like partly plugged fuel filters or temp sensors or dirty air filters the worst ones are bad catalytic converters that is always last resort

Mar 12, 2010 | 1997 Mitsubishi Mirage

1 Answer

Universal o2 censor has 2 white 1gray 1black existing wires areblack/tan dkgreen/orng blk/ltbl blk/pink


First what do you mean by a universal o2 sensor? You must make sure that you have the right o2 sensor, most newer vehicles have four o2 sensors 2 upstream and 2 downstream, upstream and downstream are meant to show where the sensors are in relation to the catalatic converter,some o2 sensors have 1 wire or up to 4 wires most with four wires are heated o2 sensors so you need to be sure you ve gotten the right o2 sensor for you vehicle as well as the right replacement for the proper location! My experience is that most after market o2 sensors have the same colored wires as the vehicle. Also most o2 sensors have electrical plugs? If you need help finding the right o2 sensor for your vehicle then please dont be affraid to ask!

Feb 12, 2010 | 1996 Jeep Grand Cherokee

2 Answers

P0136, P1131, and P1151 codes on Ford Expedition 2000 4.6L


Your auto has four O2 sensors. Two upstream and two downstream; With two banks. Bank 1, sensor 1...and bank 2, sensor 1 are the two upstream (exhaust manifold before the catalytic). Bank 1, sensor 2 and bank 2, sensor 2 (other side of catalytic)

Code 1131= upstream; bank 1..sensor 1
Code 1151= upstream; bank 2..sensor 1
Code P0136 (generic code) bank 1..sensor 2 (questionable)

I wouldn't spend the money to purchase 3 sensors. Highly unlikely all three are bad; Cost is about $40/ ea.
Since there isn't a code for the cat's themselves, I would suspect the O2 circuit is malfunctioning. The rough idle is another clue.


Take an ohmmeter set it on X10 scale and measure the resistance from engine to body and body to negative post on battery terminal. You should read zero ohms (full needle deflection). If you do go buy two upstream O2 sensors. If you read
open or a high resistance run two straps from eng. to body...and body to neg.batt. post.

FixYaWIZ................saailer

Dec 10, 2009 | 2000 Ford Expedition

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

1 Answer

O2 Sensor


Well, Bank 1 is the passenger side of the vehicle. Are you replacing upstream or downstream 02 sensor?

The upstream is in the exhaust manifold. The downstream is further down in the exhaust pipe. Upstream would be designated by the code HO2S1- B1 and the downstream would be indicated HO2S2-B1.

In either case, you basically unplug the wiring connector, use a 7/8 wrench (or an O2 sensor socket which has a groove cut in the side to allow the wiring to not be pinched) and loosen the sensor and install the new one (with anti-seize on the threads) and plug the connector in.

The upstream sensor is pretty easy- the downstream can be a little more difficult, but is not too bad.

Hope this is helpful!!

Nissan Scope Technician- 10+ years experience in Nissan dealership.

Oct 28, 2008 | 2002 Nissan Xterra

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