A DP Fix and CAN clear are two different features. A DP Fix simulates the o2 sensors and allows you to pass inspection because it allows the car to follow through with OBD readiness whereas the CAN Clear feature in the Procede and JB4 only clear the code before they have a chance to pop up. Both options won't put the car into limp mode, but the can clear will not allow a car to pass inspection if they hookup an OBD scanner.
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