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Discussion Starter · #1 ·
Im a new T100 owner and I love the truck, Im just tryin to work a few bugs out and fi it up a lil. The check engine light is on so I went under the hood and put the jumper wire in the dignostic port and the light flashed 2 times and then once after a pause. Can anyone tell me what my problem is or point me in the direction of a code list online? Thanks
 

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1998 T100 SR5 2WD
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14,751 Posts
This might help... ;)

I guess it's a code of 21? If so, then it's yer O2 sensor. Do you have the 6 cylinder or 4 cylinder? ;)
 
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