[secondchance]

On my car, a 94, I was tripping code for front. Upon careful examination, I noticed OEM set up has rubber bushing between the top of the shock to underside of the steel bracket and another rubber bushing on top of the bracket to metal plate below metal cup. The lower rubber bushings had collapsed due to age resulting in the entire assembly being pushed up and the shock pinions were too high binding inside the actuator. Been awhile but I think I replaced lower bushing (under the bracket) with a new polyurethane version but kept OEM rubber bushing because polyurethane would raise the cup too high. Shop manual section 3G-20, figure 3 illustrates top of the metal cup to top of shock pinion to be 4.5 mm. Excessive deviation can either bind the mechanism (more than 4.5 mm) or pinion not engaging the planetary gear in the actuator (less than 4.5 mm).
As for the rear, I would make sure the shock gear (pinion) is good and actuator is functioning properly.
One more thing, at times rotation of shock gear are bit stiff and may require light lubrication to encourage easier rotation to avoid triggering codes.