jumper harness.
if i get my obd2a gsr on a ond1 ecu with the jumper harness will i still be able to check my codes the same way with the 2 pin connector or will i need the scanner.
and what else will change on the car.
and will i be able to pass smog .
and what else will change on the car.
and will i be able to pass smog .
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