1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

(P0125, P1130, P1135) FIXED!!

Discussion in '1st Gen. Tacomas (1995-2004)' started by TacoJohn22, Sep 6, 2016.

  1. Sep 6, 2016 at 11:56 AM
    #1
    TacoJohn22

    TacoJohn22 [OP] New Member

    Joined:
    Sep 6, 2016
    Member:
    #196568
    Messages:
    1
    Gender:
    Male
    First Name:
    John
    Vehicle:
    2000 Tacoma Regular cab, manual, 2 wheel drive, 2.4L
    A few days ago my check engine light lit up. I scanned it and it threw 3 codes, P0125= Closed Loop Fuel Control Insufficient Coolant temp; P1130= O2 Sensor Circuit malfunction (Bank 1 Sensor 1); and P1135= O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1).

    So I purchased an up-stream(pre cat) sensor (part#234-9001) from Amazon for around $80. I also purchased a gas cap form O'rileys autoparts which was $10 because someone mentioned it may be as simple as that. I installed them both, cleared the codes..... and now it runs great!!

    Moral of the story if you have codes (P0125+P1130+P1135)= Up-stream O2 Sensor and Gas
    cap.

    IMG_8913.jpg
    IMG_8914.jpg
     
    jammer likes this.
  2. Sep 6, 2016 at 5:05 PM
    #2
    ghs57

    ghs57 Well-Known Member

    Joined:
    Jul 27, 2010
    Member:
    #40832
    Messages:
    1,091
    Gender:
    Male
    First Name:
    Chops
    Catskill Mts. NY
    Vehicle:
    '07 Black TRD OR xtracab 4.0L 4WD
    Pretty much stock right now
    I'm dealing with the upstream O2 (Air/Fuel) sensor code right now also. Waiting on the part. Throwing the P0135 code.
     
    Last edited: Sep 7, 2016
  3. Sep 7, 2016 at 7:41 PM
    #3
    Zer0

    Zer0 Well-Known Member

    Joined:
    Dec 15, 2013
    Member:
    #118626
    Messages:
    360
    Gender:
    Male
    SGV, California
    Vehicle:
    99 PreRunner
    Cool thanks!!
     
  4. Oct 25, 2020 at 6:25 PM
    #4
    thehadmatter

    thehadmatter Member

    Joined:
    Jan 1, 2016
    Member:
    #173680
    Messages:
    22
    Gender:
    Male
    Charlottesville, VA
    Vehicle:
    2001 EXT CAB SR5 2RZ-FE 5spd 2WD
    My 01 with a 2RZ-FE has P0125+P1153+P0171. Would you recommend the A/F sensor (pre-cat) as well before smoke testing? P0171 is system too lean bank 1.
     
  5. Oct 25, 2020 at 7:50 PM
    #5
    Black DOG Lila

    Black DOG Lila Well-Known Member

    Joined:
    Jun 14, 2019
    Member:
    #296344
    Messages:
    9,116
    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    01 California had A/F sensor B1S1
    Federal emissions 01 had O2 sensor
    Check the emissions sticker under hood for Cali or Fed then look up sensor and purchase identical Denso replacement from link below.
    https://densoautoparts.com/find-my-part.aspx
     
    thehadmatter[QUOTED] likes this.
  6. Nov 7, 2020 at 6:35 AM
    #6
    thehadmatter

    thehadmatter Member

    Joined:
    Jan 1, 2016
    Member:
    #173680
    Messages:
    22
    Gender:
    Male
    Charlottesville, VA
    Vehicle:
    2001 EXT CAB SR5 2RZ-FE 5spd 2WD
    Can confirm! I just replaced the A/F sensor a week ago after I got the P0125 + P1135 + P0171 and the check engine light did not return after a lengthy test drive. One of the key signs is that it's a heating circuit issue with the A/F sensor; no heat, no workee. It was Denso part 234-9001 but it didn't come with any fasteners and mine were a corroded mess. I recommend buying a few M8 x 1.25 COPPER flange locking nuts before you start just in case you need to torch and or grind your nuts off like I did mine; mind the studs. old sensor.jpg
     
  7. Oct 25, 2021 at 6:50 PM
    #7
    Motomax114

    Motomax114 IG - MKearney114

    Joined:
    Mar 26, 2014
    Member:
    #126226
    Messages:
    65
    Gender:
    Male
    First Name:
    Max
    Sacramento
    Vehicle:
    2000 4x4 TRD/SR5
    Amazing, I’m going to try this. I had mine scanned twice and in total I got all 4 codes mentioned above: P1130, P1135, P0125, and P0171.

    I’ll keep you guys updated

    UPDATE:
    This worked like a charm. I got the new A/F sensor off Amazon ($130). Installed it and drove around a bit to get the truck hot. Got home, disconnected the battery for a couple minutes to reset the code. Hooked it back up and the light is off and has stayed off since!

    I was stressed before but this was a super easy fix. Thanks OP for the original write up
     
    Last edited: Oct 29, 2021
  8. Dec 16, 2021 at 4:15 PM
    #8
    merrychristmas21

    merrychristmas21 New Member

    Joined:
    Dec 16, 2021
    Member:
    #384791
    Messages:
    1
    Gender:
    Male
    Vehicle:
    2001 Silver Tacoma PreRunner 2.7L 3RZ-FE Regular Cab
    None
    This sounds like the fix I'm looking for (P1130). I'll try it and give an update.

    *update:

    This repair fixed the code. Still failed smog because I didn't know I needed to drive a while before the computer will register the emissions info. The smog tech said I need to drive 150 miles and come back. Whoops. Aside from that everything looks good.
     
    Last edited: Jan 5, 2022
  9. Apr 26, 2022 at 11:17 AM
    #9
    96BlueTacos

    96BlueTacos トヨダ

    Joined:
    Jul 5, 2017
    Member:
    #223188
    Messages:
    1,122
    Gender:
    Male
    First Name:
    Mikey
    Earth, 3rd planet from the Sun (CO)
    Vehicle:
    1996 Single Cab Taco Manual 4x4 3.4L V6 370k /1985 4Runner 4x4 22RE 200k /2001 Double Cab Taco Auto 4x4 Supercharged 3.4L V6 180k
    1996-JBA upper control arms, replaceable Cardan joint drive shaft, leveling kit, camper shell, trailer hitch... 2001- TRD Supercharged, TRD headers...
    Revival,

    2001 3.4 4x4 automatic

    I’m getting pending codes p1130 and p0420.
    Neither of them have actually been thrown and they are getting self wiped from the ecm, but they keep popping up. I’m wondering if I really need to do the a/f or if maybe it’s something else since the codes aren’t being fully thrown. Like a gas cap
     
  10. Apr 27, 2022 at 7:52 AM
    #10
    AmherstAndy

    AmherstAndy Well-Known Member

    Joined:
    Apr 12, 2019
    Member:
    #289918
    Messages:
    651
    Gender:
    Male
    First Name:
    Andy
    Masshole
    Vehicle:
    2003 2.7L 5 speed, 4x4 J shift, Xtracab
    No comment on the pending status, but assuming you get an eventual CEL with these codes, I would start with a new A/F sensor to address P1130. P0420 indicates catalyst efficiency below threshold. It means that the rear O2 sensor isn't detecting a sufficient difference from the front A/F sensor. This can be caused by a failed catalyst, failed rear O2 sensor, possibly a failed front A/F sensor, or easiest of all, an exhaust leak.

    Before you spend a lot of money on new catalytic convertors, make sure there are no exhaust leaks between the two sensors. A shop will automatically charge you $$$ for new convertors and possibly also a new rear O2 sensor, which will undoubtedly make the code go away, but it could resolve the code because a pesky little exhaust leak is repaired in the course of replacing everything else.

    With the truck parked, run the engine and listen/feel for leaks along the exhaust between the two sensors. This is even easier when the engine is cold, because the higher idle, along with condensation in the exhaust will make leaks a bit more obvious. Flanges are a good place to start.
     
    96BlueTacos[QUOTED] likes this.
  11. Apr 28, 2022 at 5:44 AM
    #11
    96BlueTacos

    96BlueTacos トヨダ

    Joined:
    Jul 5, 2017
    Member:
    #223188
    Messages:
    1,122
    Gender:
    Male
    First Name:
    Mikey
    Earth, 3rd planet from the Sun (CO)
    Vehicle:
    1996 Single Cab Taco Manual 4x4 3.4L V6 370k /1985 4Runner 4x4 22RE 200k /2001 Double Cab Taco Auto 4x4 Supercharged 3.4L V6 180k
    1996-JBA upper control arms, replaceable Cardan joint drive shaft, leveling kit, camper shell, trailer hitch... 2001- TRD Supercharged, TRD headers...
    I appreciate the details,
    I did end up getting a denso AF sensor. Drove yesterday to and from work about 2 hours worth of driving. Pending codes haven’t come back up.

    There is no way the cat is bad because I just saw my numbers after emissions test and I passed and with flying colors. Either way I’ve got at least 2 years before anymore emissions test. And no more pending codes!
    (I have an ultragauge so that’s why I caught the pending codes before they started throwing the code, i have it set to alert for pending codes)
     
    AmherstAndy[QUOTED] likes this.
  12. Apr 28, 2022 at 7:32 AM
    #12
    AmherstAndy

    AmherstAndy Well-Known Member

    Joined:
    Apr 12, 2019
    Member:
    #289918
    Messages:
    651
    Gender:
    Male
    First Name:
    Andy
    Masshole
    Vehicle:
    2003 2.7L 5 speed, 4x4 J shift, Xtracab
    This is good info. I don't know if you can determine this with the ultragauge, but some of the readiness monitors require two complete drive cycles (certain engine parameters must be met to qualify as a drive cycle) to completely set. I'm fairly certain this is the case for EVAP codes as well as P0420, perhaps others as well. You have have achieved the two cycles with your driving yesterday, which would suggest you're in the clear.

    If you happen to know about the interaction between pending codes, readiness monitors, and how the ultragauge may shed light on this, I would appreciate an explanation.
     

Products Discussed in

To Top