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Re: CEL on 1990 GSX
Usually AutoZone and the other parts stores only pull OBDII codes. There were so many different OBDI setups that it is almost impossible for any store to carry them all. Hence OBDII, the federal government told everyone that they needed a common diagnostic protocol so that a single scanner can read every car.
And in my experience, the analog voltmeter/buzzer is by far easier to use than any aftermarket scanner on a 1g. Finding an intact DRB2 adapter for the Mitsu. at a dealership is next to impossible. And even the Snap-On scanners often have trouble working right.
Wiz
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