Check engine light
02-28-2004, 07:47 PM
#1
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Check engine light
Ok my check eng. lt. came on again after I had reset the efi fuse, a friend of mine told me that it could be the o2 sensor being that my runner has 100k mls on it, any help will be appreciated. 
02-28-2004, 08:14 PM
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It would be best to get the code first before you do any part replacing. Not too long ago I posted the OBD II error codes in the maintenance section and if you take a look at it here:
https://www.yotatech.com/forums/show...obd+diagnostic
you'll see that there's a WHOLE bunch of possibilities for that CEL.
If you're willing to take a chance you may think about purchasing this little item:
https://www.yotatech.com/forums/f2/creader-obd-ii-diagnostics-code-reader-27751/
and seeing what code(s) you get. I pulled some codes but haven't decided to give it my full endorsement yet because I haven't been able to determine if the codes it gave me are indeed the reasons behind the CEL. I'm pretty sure but I don't want anyone to get mad at me so I'm holding back until I see that warning light disappear.
If it is indeed the O2 sensor try a search using "generic" and "sensor" if you're looking for a cheaper aftermarket solution. Otherwise the dealer will charge you over $100 for the code reading and about $200-300 for the O2 replacement.
Definitely figure out what the cause is first though.
https://www.yotatech.com/forums/show...obd+diagnostic
you'll see that there's a WHOLE bunch of possibilities for that CEL.
If you're willing to take a chance you may think about purchasing this little item:
https://www.yotatech.com/forums/f2/creader-obd-ii-diagnostics-code-reader-27751/
and seeing what code(s) you get. I pulled some codes but haven't decided to give it my full endorsement yet because I haven't been able to determine if the codes it gave me are indeed the reasons behind the CEL. I'm pretty sure but I don't want anyone to get mad at me so I'm holding back until I see that warning light disappear.
If it is indeed the O2 sensor try a search using "generic" and "sensor" if you're looking for a cheaper aftermarket solution. Otherwise the dealer will charge you over $100 for the code reading and about $200-300 for the O2 replacement.
Definitely figure out what the cause is first though.
02-28-2004, 08:26 PM
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thanks for the info, I guess I'll wait and see if your little gadget works, I'm from CA but I'm working in NJ for a while and my truck is here with me, I wonder if they do the reading in Jersey.
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02-29-2004, 04:24 AM
#10
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Originally Posted by Tacoma Dude
Dude, it's CA - people sue over crosswalk buttons 
The dollar rules over common sense out there. :pat:
As for your problem, I would bet O2 sensor (based on mileage and year).
Do yourself a favor and pull the codes to know for sure!
Then post back with the code you get and we can help then.
Last edited by MTL_4runner; 02-29-2004 at 04:45 AM.
02-29-2004, 08:16 AM
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Got it, I will take to this friendly shop around me, they told me that they have an odb reader and I'm pretty sure that it's going to be cheaper than the dealer, I will post results later.
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