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HELP with check engine light code P2238

Discussion in '2nd Gen. Tacomas (2005-2015)' started by NEWYORKHILLBILLY, Oct 8, 2017.

  1. Oct 8, 2017 at 7:04 AM
    #1
    NEWYORKHILLBILLY

    NEWYORKHILLBILLY [OP] Member

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    I have a 2013 taco 6cyl 44000 miles and it throwing this code P2238 positive current low

    I believe its the o2 sensor . where is this sensor located? here is a picture from scan tool. would the emission warranty cover this?
    IMG_20171008_093802.jpg
     
  2. Oct 8, 2017 at 7:28 AM
    #2
    80schild

    80schild Well-Known Member

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    Check your battery first. Mine was throwing a O2 sensor low voltage code due to a weak battery.
     
    Whitetrash likes this.
  3. Oct 8, 2017 at 8:13 AM
    #3
    Sandman614

    Sandman614 Ex-Snarky TWSS elf, Travis #hotsavannahdotcom

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    I doubt the emissions warranty would cover it, that's for the cats themselves.
     
  4. Oct 8, 2017 at 8:19 AM
    #4
    Sandman614

    Sandman614 Ex-Snarky TWSS elf, Travis #hotsavannahdotcom

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    Just to give you some expanded information from the FSM

    p2238 Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)

    upload_2017-10-8_11-17-34.jpg
    upload_2017-10-8_11-18-40.jpg

     

    Attached Files:

  5. Oct 8, 2017 at 8:24 AM
    #5
    Sandman614

    Sandman614 Ex-Snarky TWSS elf, Travis #hotsavannahdotcom

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    [​IMG]
    *similar drawing, Bank 1 is Passenger side
     
  6. Oct 8, 2017 at 9:20 AM
    #6
    NEWYORKHILLBILLY

    NEWYORKHILLBILLY [OP] Member

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    This is very helpful . just so i understand this is the passenger side sensor just after the manifold. I guessing its that sensor rather than wiring. would you use a Toyota sensor or after market? again thanks for the help IMG_20171008_121010.jpg
     
  7. Oct 8, 2017 at 9:28 AM
    #7
    Sandman614

    Sandman614 Ex-Snarky TWSS elf, Travis #hotsavannahdotcom

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    I would use a Denso(OE) bought from Amazon or rockauto after looking up the p/n at http://densoautoparts.com/find-my-part
     
  8. Oct 8, 2017 at 9:53 AM
    #8
    Tex-Tac

    Tex-Tac Well-Known Member

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    Installed Overhead Compass and Temperature Display along with outside temperature sensor and wiring; LED lights reverse backup; LED license plate lights; Added GTA Bluetooth Audio kit to stock radio for iphone audio; Spare tire steel braided air hose extension connection to rear bumper; Installed new headlights along with new bulbs PIAA H4 XTreme and for fog lights PIAA H10 XTreme bulbs. Installed new hood with "hood-scoop". Installed Predator Side Steps. Replaced front chrome grill with customized color matched (Desert Sand Mica) grill with added TOYOTA lettering (also in matched color), installed and secured tailgate anti-theft devices. Also installed a new external TPMS monitor for all 4 tires.
    Sub'd
     
  9. Oct 8, 2017 at 10:20 AM
    #9
    JaxJim

    JaxJim Well-Known Member

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    Exterior: Duratrac 265/70/17, SpiderTrax 1.25" wheel spacers, BAMF sliders, DiamondBack SE Tonneau Cover, Pop&Lock, Tail Gate guard, Bed Mat, Bullaculla Trailer Harness bracket, Front Side Windows tinted to match rear, Removed all chrome and dealer badges, Toyota OEM Roof Rack/Rails, SOS Concepts Front Recovery bracket Under Hood: Redline Tuning Quicklift Hood Struts, Foglight anytime mod, UniFilter for Secondary Air Pump Interior: Seat bell Chime disable (TechStream), WeatherTech floor liners, ImMrYo rearview mirror relocation bracket, 12v Always-on Power port in console Radios/Comms: AntennaX 14", Escort Passport MAX Radar Detector, Yaesu 2900 Ham Radio, Uniden 980SSB CB Radio, Relentless Fabrication hood antenna mount, BAMF tailgate antenna mount, FireStik 2m and CB antennas, FireRing coax
    I know on Honda's, I've used non-oem parts for emission controls (Like O2 sensors) and they didn't last as long as OEM. Very limited experience and different make of vehicle, but I'll go OEM when something goes on the Toyota.
     
  10. Oct 8, 2017 at 10:22 AM
    #10
    JaxJim

    JaxJim Well-Known Member

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    I should add that when I put an OEM O2 sensor in the Honda, the sensor lasted as long as the original (about 60k miles) vs about 20k on the non-oem.
     
  11. Oct 8, 2017 at 12:48 PM
    #11
    80schild

    80schild Well-Known Member

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    I used Denso 234-9026. I didn't even need them, because like I mentioned, once I put in a new battery the code went away on its own after about three days. I also had an ABS low voltage code, which also went away.

    By that point I had already ordered the sensors, so I went ahead and replaced them anyways since my truck is at 100k miles. I didn't feel like fooling with sending them back.
     
  12. Oct 8, 2017 at 1:12 PM
    #12
    Sandman614

    Sandman614 Ex-Snarky TWSS elf, Travis #hotsavannahdotcom

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    I believe 09+ uses a different p/n longer cables because they're relocated on the pipes.
     
  13. Oct 8, 2017 at 3:14 PM
    #13
    NEWYORKHILLBILLY

    NEWYORKHILLBILLY [OP] Member

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    when i look up the Denso part it shows 234-9111
     
  14. Oct 8, 2017 at 5:16 PM
    #14
    80schild

    80schild Well-Known Member

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    Mine has headers, so no idea.
     
  15. Oct 12, 2017 at 11:37 AM
    #15
    NEWYORKHILLBILLY

    NEWYORKHILLBILLY [OP] Member

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  16. Feb 7, 2018 at 2:06 PM
    #16
    80schild

    80schild Well-Known Member

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    So I went out to start my truck today, but I didn’t hold the key long enough, so it stumbled and I had to restart it (I’m used to auto start in the Tundra). After I started driving the CEL light came back on, and it’s the P2238 code. Both of my upstream O2 sensors are new. All I can think of is that one little stumble where it didn’t start right away must have set the code.
     
  17. Feb 7, 2018 at 2:41 PM
    #17
    NEWYORKHILLBILLY

    NEWYORKHILLBILLY [OP] Member

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    In my case it turned out to be something in the plug, After i got the parts i unplugged it. But i needed another tool I plugged it back in and it went off and has never sent the code again. I would unplug it and make sure its dry and re plug in. Its worth a try
     
  18. Feb 7, 2018 at 3:55 PM
    #18
    80schild

    80schild Well-Known Member

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    I cleared the code and drove it a couple more cycles, and so far no more CEL. It has been rainy today, so who knows. That code seems to be a very easy one to set on Toyotas. The first time it set it was due to a weak battery.
     
  19. Feb 7, 2018 at 5:19 PM
    #19
    magnetic4x4

    magnetic4x4 Well-Known Member

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    My 2013 with 52k miles has had a p2237 and p2238 off and on for probably 2-3 months now. It would stay on for awhile and go off for awhile. I decided to unplug the sensor, check out the connector and plug it back up. The light stayed out for about 800 or so miles before coming back on and it's still on nearly a month later.
     
  20. Feb 7, 2018 at 6:03 PM
    #20
    80schild

    80schild Well-Known Member

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    Hmm. I may try to get some electrical contact cleaner and spray the connectors.
     

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