CorkSport.com is MAZDA PERFORMANCE!
CorkSport.com is MAZDA PERFORMANCE!
Page 1 of 2 12 LastLast
Results 1 to 15 of 25

Thread: Bank 1 & Bank 2 Oxygen Sensors

  1. #1
    Registered Member

    2002 Mazda Protege 5

    Join Date
    May 2013
    Location
    Vail, CO
    Posts
    1

    Bank 1 & Bank 2 Oxygen Sensors

    Hey all-

    I own a 2002 Protege5. Recently, my CEL threw a P0031 code (Bank 1 O2 Sensor - Low Voltage). Perfect example of what's going on with my car can be found here: http://www.mazdas247.com/forum/showt...-bad-o2-sensor

    My question is, can I buy the same O2 sensor for both Bank 1 and Bank 2? Figure I might as well replace both while I'm at it.

    Thanks,
    Matt

  2. #2
    Registered Member LtStiles's Avatar

    2002 Mazda Protege5

    Join Date
    Apr 2012
    Location
    Raleigh, NC
    Posts
    93
    Before you go ripping out and replacing sensors. Make sure you don't have any holes or tears in the tube between the MAF and the throttle body. Just went through a very similar situation and checking for that would have saved me a lot of time.
    (redp5) 20% Tint; PowerBass S-104DX Subwoofer; PowerBass ASA 300.2x Amp; Pioneer TS-G6844R Front Door Speakers; Sony Xplod XS-GT1327A Rear Door Speakers; SICKSPEED Supertones; Plasti-dipped emblems and valence; MSR 17" 092s; Silverstar Ultras

    Soon to add: Shorty antenna;

    Looking for: Lower front grille; cat-back exhaust; Mudflaps

    Build Thread:http://www.mazdas247.com/forum/showt...olfpack-Red-P5

  3. #3
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    3,138
    Our cars don't have 'bank one' or 'bank two'. We have upstream and downstream. They are different sensors. The upstream one is the important one,... the downstream is almost a 'dummy' sensor.

    We have two sensors in the same bank.

  4. #4
    Registered Member

    2002 Protege5 Sunlight Silver Metallic

    Join Date
    Dec 2012
    Location
    Richmond, KY
    Posts
    7
    I am experiencing the same issue, but I am not sure what the solution is. I have replaced the intake tube a year ago, and I can confirm that there are no holes in it. The McParts store said specifically that the code does NOT mean the sensor is bad. The car still runs like a champ, gas mileage isn't suffering. Not looking to replace a whole bunch of things that aren't broke, but my OCD is telling me the light must not stay on.

  5. #5
    Registered Member


    Join Date
    Apr 2009
    Posts
    62
    Hey all. I am getting this code too. I have a yellow P5 automatic 2003.

    I Had the air intake tube replaced recently because there were tears in it and haven't had any issues for months. Now I get P0031 when I start the car. I connected the OBD reader to it and both sensors show data when I accelerate.

    When I clear The code, the code comes back upon car startup and stays on until manually cleared. Sometimes it does not come on atall, but it's happening more and more.

    Where is the bank 1 sensor 1 located? Is it something I'll be able to get to from the top of the car or will it need to be hoisted? Thanks!

  6. #6
    Registered Member


    Join Date
    Apr 2009
    Posts
    62
    Also, does anyone know the part number for the sensor? Someone posted an Ebat link to it here, but the item is long-gone.

    https://www.mazdas247.com/forum/show...ge-with-Photos

    Parts manual, P. 334, under the Exhaust section there are these, are they what I am looking for?
    Probably ZM03-18-861A-9U as I have a Canadian car.

    15 Sensor, Exh Manifold Oxygen
    1.6L Eng
    w/Calif Emission ZM03-18-861A-9U
    w/o Calif Emission ZM01-18-861A-9U
    1.8L Eng FP49-18-861-9U
    2.0L Eng FS7N-18-861-9U

  7. #7
    Registered Member

    Protege5

    Join Date
    Jan 2015
    Location
    Springfield, MO Area
    Posts
    911
    B1S1 is on the exhaust manifold. I'm showing Denso 2344721 for that sensor.
    2002 Protege5 5 Speed, Pure White, FSZE Swap, Konig Incident 17's
    1998 Ford Ranger 2.5 5 speed
    1987 Mazda RX7, SBC swap in progress
    1998 Honda CBR900RR
    2013 Honda CB500F

  8. #8
    Registered Member


    Join Date
    Apr 2009
    Posts
    62
    Quote Originally Posted by MrGiggles View Post
    B1S1 is on the exhaust manifold. I'm showing Denso 2344721 for that sensor.
    im gonna look for cheaper. Is this considered upstream or downstream?

  9. #9
    Certified Mazda Tech hornsfan10609's Avatar

    2003.5 Mazdaspeed Protege x2

    Join Date
    Jun 2009
    Location
    Austin, Tx
    Posts
    8,086
    upstream
    Mod List. "Jinba Ittai"

    2003.5 Titanium Mazdaspeed Protege #1345 Purchased 7/20/10
    2003.5 Titanium Mazdaspeed Protege #1574 Purchased 10/25/14

    2009 Highland Green Mustang Bullitt #5998 12.9@110
    2002 Red Protege5 RIP:4/25/10

  10. #10
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    3,138

  11. #11
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    3,138

  12. #12
    Registered Member


    Join Date
    Apr 2009
    Posts
    62
    Hey, what do you guys think of this idea...
    I ordered the part from my local shop - fully returnable. If I just plug in the new sensor (without installing it into the manifold), and the P0031 code goes away, then I can be certain the old sensor wasn't working optimally, right?

    Of course, I know that a bunch of other codes will start popping up when I start the car because the sensor isn't installed, but at least I'll rule out the actual sensor as the problem.

    This is what I did with my broken ABS sensor and it worked...I plugged in the new sensor and the error code was gone, because the computer no longer detected voltage issues in a bad sensor. The I proceeded to have the ABS sensor installed by a mechanic and everything has been fine since.

  13. #13
    Registered Member

    Protege5

    Join Date
    Jan 2015
    Location
    Springfield, MO Area
    Posts
    911
    Quote Originally Posted by mark2000 View Post
    Hey, what do you guys think of this idea...
    I ordered the part from my local shop - fully returnable. If I just plug in the new sensor (without installing it into the manifold), and the P0031 code goes away, then I can be certain the old sensor wasn't working optimally, right?

    Of course, I know that a bunch of other codes will start popping up when I start the car because the sensor isn't installed, but at least I'll rule out the actual sensor as the problem.

    This is what I did with my broken ABS sensor and it worked...I plugged in the new sensor and the error code was gone, because the computer no longer detected voltage issues in a bad sensor. The I proceeded to have the ABS sensor installed by a mechanic and everything has been fine since.
    Yeah, theoretically. The heater is activated right away after you turn the key on.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  14. #14
    Registered Member


    Join Date
    Apr 2009
    Posts
    62
    How hot does it get, i guess I'd better make sure it's not around anything too flammable or resting on top of something that will melt, right? For safety?

    Thanks.

  15. #15
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    3,138
    You should just install your new O2 sensor...
    The computer knows if your old heater is burned out... No current flow...
    I'm sure you can be more than 95% sure the new sensor will fix your problem... It's like a burned out bulb.
    Stop far tin around and be done with it... O2 sensors do wear out...

Page 1 of 2 12 LastLast

Similar Threads

  1. Replies: 0
    Last Post: 08-22-2011, 05:20 PM
  2. GTR vs. bank
    By Falango in forum Off Topic
    Replies: 6
    Last Post: 10-07-2009, 04:03 PM
  3. WTB: Bank 1 o2 sensor
    By sean22306 in forum Completed Transactions
    Replies: 1
    Last Post: 05-25-2009, 12:15 AM
  4. Bank 1 Sensor?
    By CraZy2.0L in forum Protege5
    Replies: 6
    Last Post: 11-30-2008, 09:34 PM
  5. WTB: Bank 2 O2 sensor
    By Gimmethagoods in forum Completed Transactions
    Replies: 6
    Last Post: 03-20-2007, 06:08 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •