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Check Engine Light

Discussion in '1st Gen. Tacomas (1995-2004)' started by philmdnls, May 23, 2017.

  1. May 23, 2017 at 9:48 AM
    #1
    philmdnls

    philmdnls [OP] Well-Known Member

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    My check engine light came on a week and a half ago. It came on after I got bored at a stop light and turned off the overdrive and then back on (don't think this had anything to do with it). I stopped at an Autozone a few days later and had it checked out when I got my mom's car a new alternator, and a code didn't show up. The guy helping me and I were a little confused so we went back out to the truck and he asked me when it comes on and I told him after I crank it. He had me crank it and whaddya know, it doesn't light up. Fast forward about three days later and it comes on again. I currently have a hole in my muffler and a muffler is on the way to replace it. Do you think that could be a cause? I've already checked the gas cap to make sure it was tightened. I'm just confused because it didn't throw any codes, so any ideas?

    Any thoughts or advice is much appreciated.
     
  2. May 23, 2017 at 10:33 AM
    #2
    jbrandt

    jbrandt ......LOADING

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    Kings, J59's Total Chaos UCAs Custom skids Sticker mod
    It's odd that after the CEL, you didn't have a code, as they usually stay in the memory until it's cleared. Did you disconnect the battery in between the time the CEL came on and you had the codes checked?

    I would suggest getting a OBDII code reader.

    I have this one.

    https://www.amazon.com/BAFX-Product...?ie=UTF8&qid=1495560072&sr=8-4&keywords=OBDII

    Some apps are free, I have the Torque app which was like $5 I think.

    Best $20 I've spent in a while. You can hook it up to your smartphone and leave it connected while you drive. Then just drive around normally and if the CEL comes on again, check for codes again.
     
  3. May 23, 2017 at 10:36 AM
    #3
    philmdnls

    philmdnls [OP] Well-Known Member

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    Thanks for the info, I'll look into that product. To answer your question from before, I didn't disconnect my battery or have it cleared. It was just normal day-to-day driving for the few days before I stopped at Autozone.
     
  4. May 23, 2017 at 11:10 AM
    #4
    jbrandt

    jbrandt ......LOADING

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    So did the CEL come on and stay on until you had Autozone check it? or did it go on, then off again fairly quickly?

    There is a possibility that it may not be throwing a code because of something like a emissions test not being complete, or perhaps Autozone used a crappy reader that couldn't read that code (I'd like to think autozone uses a commercial grade reader).

    Would be odd for an emissions test to not be complete, but you never know. Some tests need pretty specific driving conditions to complete, and (again) I would like to assume that the Autozone folks would check that, too...

    I did a little searching around, and another possibility is a bad computer is just throwing an erroneous CEL with no actual codes.

    But hopefully driving around with the OBD hooked up will help narrow down the issue. Besides, the OBDII's are just handy to have anyway to help track gas mileage etc...
     
  5. May 23, 2017 at 11:16 AM
    #5
    philmdnls

    philmdnls [OP] Well-Known Member

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    It came on and would remain on whenever the truck was running. They checked it at Autozone and it was still on. When we turned the truck back on the second time to recheck after the computer didn't show any codes, that's when the light didn't come back on. I may bring it later this week to other auto parts stores, O'Reilly's, Advanced, and NAPA, just to see if they can read a code. May buy a scanner while I'm at one of those.
     
  6. May 23, 2017 at 1:25 PM
    #6
    otis24

    otis24 Hard Shell Taco

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  7. May 25, 2017 at 5:34 AM
    #7
    philmdnls

    philmdnls [OP] Well-Known Member

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    Update

    Stopped by at an Advanced Auto Parts yesterday and the man that helped me did pull of two codes. Both of which were for parts in the emissions (i.e. an oxygen sensor or something like that). He said that their code reader couldn't give detailed enough information to be able to say exactly what was causing the check engine light to go off. He recommended taking it to a garage because they'll be able to tell exactly what it is and he also informed me that they should do this for free. I then told him that there was currently a hole in my muffler and he said that it could also be the cause. I am taking it to my local Toyota Dealership tomorrow to have it checked out to make my mom happy, because she isn't comfortable with me driving an hour and a half away with the check engine light on to scrap some metal in a buddy's great grandmother's yard. So hopefully I'll be able to get it to go away or find out what it is exactly this Friday so I can go Saturday!
     
  8. May 25, 2017 at 7:01 AM
    #8
    otis24

    otis24 Hard Shell Taco

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    02 sensor is an easy fix as long as the bolts aren't rusted to the studs.
     
  9. May 25, 2017 at 7:06 AM
    #9
    philmdnls

    philmdnls [OP] Well-Known Member

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    That's good to know, but hoping it's just the muffler since I already have one on the way and it's one less thing to buy.
     
  10. May 25, 2017 at 7:10 AM
    #10
    otis24

    otis24 Hard Shell Taco

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    No doubt. I think the 02 sensor is 100something dollars too.
     
  11. May 25, 2017 at 7:36 AM
    #11
    philmdnls

    philmdnls [OP] Well-Known Member

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    Yeah, would rather not spend that much on top of a muffler. Considering it's hard enough gathering money as a high school student. :(
     
    otis24 likes this.
  12. May 25, 2017 at 8:07 AM
    #12
    otis24

    otis24 Hard Shell Taco

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    I know how you feel. I just spent $1000, a full Saturday and half a Sunday replacing all my AC components...compressor, condensor, evaporator, high pressure switch, Evaporator, expansion valve, oil and all the other things. While we were in there we replaced the timing belt along with the tensioner, water pump, idler pullies, thermostat, lower radiator hose, all the belts and fan clutch. Youch.
     
  13. May 25, 2017 at 8:17 AM
    #13
    philmdnls

    philmdnls [OP] Well-Known Member

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    I'd much rather be spending money on modifications than repairs and replacements. Oh well. My truck might not be finished like I want it in a year, but hopefully it'll get to where I want it soon enough.
     
  14. May 25, 2017 at 8:17 AM
    #14
    philmdnls

    philmdnls [OP] Well-Known Member

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    I'll keep this updated tomorrow and then if we figure out what's making the check engine light go off.
     
  15. May 25, 2017 at 8:22 AM
    #15
    otis24

    otis24 Hard Shell Taco

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    No kidding! I was going to get rid of my bed and build a pop top aluminum camper, but I did this instead. The camper will have to wait till next year.
     
  16. May 25, 2017 at 8:24 AM
    #16
    philmdnls

    philmdnls [OP] Well-Known Member

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    Your truck looks great! Can't wait to see what else you do.
     
  17. May 25, 2017 at 9:23 PM
    #17
    ShawnTurner

    ShawnTurner New Member

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    Just starting lol.
    They quoted you the Bosch one didn't they ? Autozone quoted me the Bosch one lol $100.00. No thanks, came home went straight to EBay And found this one

    IMG_6301.jpg
     
  18. May 26, 2017 at 6:49 AM
    #18
    otis24

    otis24 Hard Shell Taco

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    I got a toyota OEM one on Amazon for about $100...it was awhile ago, I don't quite remember. I try to stick to OEM being that I'm planning on keeping my truck until at least 2030. I'm sure the other brands are okay. But, the OEM one lasted 200,000 miles with no issues. I'm okay with spending a little more money on proven parts.
     
  19. May 26, 2017 at 7:01 AM
    #19
    cruiserguy

    cruiserguy Well-Known Member

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    Do you happen to know the two actual codes from when they scanned your ECU? Also, when changing out O2 sensors or AFR sensor, Yotas can be pretty picky about which brands are used on their electronically controlled systems. You probably only want to source Denso brand(who makes the OEM sensor for Toyota) or if you enjoy paying the Yota mark up on parts, any dealer or online parts dealer.
     
  20. May 26, 2017 at 7:06 AM
    #20
    philmdnls

    philmdnls [OP] Well-Known Member

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    Thanks for the advice! And no I do not. Maybe the info I get from my local dealership today will help. I'll keep whosever interested in this thread posted.
     
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