94 e420 119K miles.

What does it mean if I cannot get any codes out of the diagnostic module?
It will not flash on the home built reader or the built in one.

I just tested all of the pins and I only have code 10 on pin 6 and code 5 on pin 7. I cleared these and the CEL remains on.

__________________
Will
94 E420
82 300DT
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