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Well, it Does. At least it did,on the TJ. there's your grain of salt.
::: Edit :::
Also, When checking the TJ codes the Guages will test themselves.
Hold the Odometer turn the key to on.
you will here a Beep and then it will show a single string of numbers. (253497123) this will fill the Digital Odometer area.
After this string it will give you SoF 3.0 (or what ever version you have)
Then fault numbers or No Faults
Then your guages will systematically check themselves popping into 2 or 3 positions per guage. Then The test will end.
This will reset the computer and it takes a few driving cycles to get the error back. The Techs tried to read mine and saw nothing even as the check engine or MIL (Malfunction Indicator Light) was shinning brightely.
2 days later they plugged in again and there was the Error. Not a code but an error. Therm stuck Open is what the computer had as an error, not a code number.
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