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Which o2 sensor on a 2002 2.5 nissan altima is bank i downstream top or bottom

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

johnny5846
  • 379 Answers

SOURCE: location of a o2 sensor 2001 nissan maxima

bank 1 refers to the side of the engine that #1 cylinder is on , and sensor 2 refers to downstream , after the catalytic converter. , this link shows bank 1 on a 2001 nissan maxima V6 being on the firewall side . if you had a 4 cylinder it would be downstream after the catalytic converter .

http://www.autozone.com/N,26200242/shopping/specsSelect.htm



Posted on Jan 04, 2009

  • 112 Answers

SOURCE: 2002 Pontac Grand Prix GTP P0171 code engine stumbling at times

Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.

Posted on Mar 29, 2009

USfalcon
  • 175 Answers

SOURCE: O2 Sensor problem

this pic with be the fix ya
bcc112d.gif

Posted on Apr 10, 2009

  • 508 Answers

SOURCE: Getting PO141 trouble code when scanning! Car '03 accord, 2.4 ltr

http://www.honda-tech.com/showthread.php?t=2385730 good luck!

Posted on Jun 22, 2009

Testimonial: "Thanks! I figured out po141 is the sensor that goes into the cat after studying few books and trial and error. Part store gave me the wrong info 1st. "

  • 318 Answers

SOURCE: P0420 and P0430

The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.

Posted on Sep 25, 2009

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1 Answer

Bank 2 O2 sensor


O2 sensors are after the cat converter
HO2S sensors are in the manifold before the cat converter
bank 2 is normally the front bank

Jun 30, 2015 | Cars & Trucks

1 Answer

1998 nissan altima trouble code p0135


The code P0135 means O2 sensor heater circuit malfunction bank 1 sensor 1. This means you most likely have a bad O2 sensor. The possible causes are:

TT - Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM) Usually the code indicates a bad Oxygen sensor, but an intake vacuum leak or a failing fuel pump can cause the code, so check your intake vacuum hose for a leak or hole. But most likely, you have a faulty Oxygen sensor. Now Bank 1 Sensor 1 means the bad O2 sensor is the one on the number one cylinder side (which is the cylinder closest to the timing belt or where all your belts and pulleys are),which is bank one. If you look really closely, you will see that the number 1 cylinder is just a little bit closer to the belts than the number 2 cylinder. Now that you know which side you are dealing with, the next step is which sensor. There are two O2 sensors on each side (upstream or downstream), four total. Sensor 1 is the upstream sensor, which is before the catalytic converter closest to the exhaust manifold. Number 2 sensor is on or after the catalytic converter. So in short, you are replacing the O2 sensor on the Number 1 cylinder side before the catalytic converter. They are a pain to remove. Get some Pb Blaster lubricating oil and spray on the threads and let sit for 10 minutes and spray it again. You will need a 7/8 Oxygen sensor removal socket to remove it. Don't forget to disconnect negative battery terminal and O2 wire harness first.. Any questions please feel free to email me. Good luck.

Nov 30, 2013 | 1998 Nissan Altima

1 Answer

Downstream oxygen sensor H02 Bank 1 & Bank 2


Bank 1 o2 sensor is located in the exhaust manifold up by the motor bank 2 is located downstream futher in front of the cat.converter mounted in the exhaust pipe.

Aug 12, 2013 | 2002 Mercury Sable

2 Answers

Which sensor is the bank 2 sensor 1 for a 2001 nissan sentra?


Unless I am missing something the 2001 nissan sentra has two four cylinder engine options.

The bank refers to which side of the engine. a four cylinder only has one bank so there can only be a bank 1. A v-6 or v-8 will have two banks since there is a bank of cylinders on each side of the engine. So there will be a bank 1 which is always the same side of the engine as the number one cylinder, and a bank 2 which is always the other side of the engine.

Sensor refers to upstream or downstream of the catalytic converter. Sensor one is upstream or before the cat. Sensor 2 is downstream or after the cat.

If you entered the wrong year or wrong vehicle or if you can post the actual code I will see if I can help you further.

Sep 17, 2011 | 2001 Nissan Sentra

2 Answers

How do I tell if i need an upflow or downflow oxygen sensor for my 2003 nissan altima 2.5l?


You need the code read to get the fault code

Upflow = Sensor 1 Bank 1 or 2

Downflow = Sensor 2 Bank 1 or 2

Dec 01, 2010 | 2003 Nissan Altima

1 Answer

Where is the o2 sensor on a 2002 explorer bank 2 downstream


drivers side is bank two the o2 should be next to the cat. you can remove it using 7/8 wrench or buy o2 socket.

Feb 13, 2010 | 2002 Ford Explorer

1 Answer

2002 nissan sentra gxe 1.8 bank2 sensor1 federal emission.Which sensor do I replace?Top/bottom,driver/pass side?


The 1.8 is a 4 cyl. engine . it has only 2 oxygen sensors . Nissan engine controll systems devides its EGO sensors into banks . Bank 1 is the upstream (top before the catylyctic converter) . Bank 2 is the downstream (after the cat. conv.) I recomend you change both for emissions reasons

Jan 15, 2010 | 1996 Chevrolet K1500

2 Answers

Location of a o2 sensor 2001 nissan maxima


bank 1 refers to the side of the engine that #1 cylinder is on , and sensor 2 refers to downstream , after the catalytic converter. , this link shows bank 1 on a 2001 nissan maxima V6 being on the firewall side . if you had a 4 cylinder it would be downstream after the catalytic converter .

http://www.autozone.com/N,26200242/shopping/specsSelect.htm



Jan 04, 2009 | 2001 Nissan Maxima

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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