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How many 02 sensors are on the 1998 2.4 tacoma?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Tacoma Cutout, Jul 15, 2018.

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  1. Jul 15, 2018 at 9:23 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    I believe there are two, one before and one after the Cat. Is that all? Thx as usual for the replies:)
     
    Tacoma Cutout, Jul 15, 2018
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  2. Jul 15, 2018 at 9:24 PM
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    Sperrunner

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    Sperrunner UA342

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    You sir are right
     
    Sperrunner, Jul 15, 2018
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  3. Jul 15, 2018 at 9:24 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    2
     
    Speedytech7, Jul 15, 2018
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  4. Jul 15, 2018 at 9:30 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Excellent! Thank you. Rock Auto has Densos for upstream and downstream with different part numbers and yet, the oem part numbers they list are the same for both? What gives?
     
    Tacoma Cutout, Jul 15, 2018
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  5. Jul 15, 2018 at 9:34 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    Can you take a picture of the sticker under you hood that lists what it is equipped with? That way j can show you the right sensors to get for it.
     
    Speedytech7, Jul 15, 2018
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  6. Jul 15, 2018 at 9:46 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Here ya go, Thx.

    IMG_1197.jpg
    IMG_1200.jpg
     
    Tacoma Cutout, Jul 15, 2018
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  7. Jul 19, 2018 at 5:52 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Speedytech7, any chance on identifying the correct sensors before I order them?
     
    Tacoma Cutout, Jul 19, 2018
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  8. Jul 19, 2018 at 5:52 PM
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    Sperrunner

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    Sperrunner, Jul 19, 2018
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  9. Jul 19, 2018 at 5:54 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    I got you... Gimme a min
     
    Speedytech7, Jul 19, 2018
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  10. Jul 19, 2018 at 5:58 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    Speedytech7, Jul 19, 2018
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  11. Jul 19, 2018 at 6:54 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Awesome! Thanks!
     
    Tacoma Cutout, Jul 19, 2018
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  12. Jul 19, 2018 at 7:09 PM
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    onakat

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    onakat Well-Known Member

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    I ordered the same sensors for my truck and they weren't the right ones...
    The rear one (4153), the wires were too short so I had to cut the new sensor wires and solder them to the old wiring
    As for the front one (4162), the connector wasn't exactly the same. I had to file down tabs on the new connector to get it to fit

    But my little hack did work in the end, as p0141 code never came back
     
    Last edited: Jul 19, 2018
    onakat, Jul 19, 2018
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  13. Jul 19, 2018 at 7:49 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Just ordered the 2 Denso o2 sensors from Ebay. $47 & $48. :bowdown:
     
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    Tacoma Cutout, Jul 19, 2018
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  14. Jul 19, 2018 at 7:51 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Hmmm I didn't see this last message... They are supposed to be oem design...
     
    Tacoma Cutout, Jul 19, 2018
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  15. Jul 19, 2018 at 8:27 PM
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    fortiz619

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    fortiz619 yeh i drive a 2wd big woop wanna fight about it?

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    I’d double check to see if the sensors you purchased are the correct ones , I replaced mine (after cat) and received a short one with the “correct” part number which was returned , the post cat sensor has a long wire with connector that’s connects up in the cab
     
    fortiz619, Jul 19, 2018
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  16. Jul 19, 2018 at 8:29 PM
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    fortiz619

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    fortiz619 yeh i drive a 2wd big woop wanna fight about it?

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    fortiz619, Jul 19, 2018
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  17. Jul 19, 2018 at 8:56 PM
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    Tacoma Cutout

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    Tacoma Cutout [OP] Well-Known Member

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    Well I guess I will find out... Thanks for the input:thumbsup:
     
    Tacoma Cutout, Jul 19, 2018
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  18. Jul 25, 2018 at 7:15 PM
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    onakat

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    onakat Well-Known Member

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    Now I know why the front sensor connector wasn't matching..... it's supposed to be an A/F sensor and not a o2 sensor like I thought... so the part I needed was in fact
    $146 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles
    234-9001. Now I have a nice p1130........ glad I kept the still good old one, just in case...

    strange that it does not list it anywhere as compatible with my truck as it turns out this is the part I needed as well... well, at least my hack worked, p0141 is not back
     
    onakat, Jul 25, 2018
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  19. Jul 25, 2018 at 7:17 PM
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    Speedytech7

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    Speedytech7 Toyota Cult Ombudsman

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    That's why I asked to check that label know his hood, it will say AFS if it needs to be an AF sensor.
     
    Speedytech7, Jul 25, 2018
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  20. Jul 25, 2018 at 7:40 PM
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    onakat

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    onakat Well-Known Member

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    IMG_20180725_222749173.jpg

    seems my truck is both federal and california?
    I was like, "to hell with california emissions! I'm in canada"... but apparently I can't do that, as I just found out...
    So, other than this A/F sensor, is there other things I can't replace with non-cali? what about the cats?
     
    Last edited: Jul 25, 2018
    onakat, Jul 25, 2018
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Products Discussed in

Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles
$145.46
Denso 234-4189 Oxygen Sensor
$60.51
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