After 4 years I got a nice Level 2 Bosch Evse. Did the install myself, a short run from a 200 amp panel, used 10 gage with a 30 amp breaker. It was working fine for about 2 weeks loving the 3 1/2 hour full charge. Then it started interrupting first at 90% then eventually it won't accept the L2 charge for more than a couple minutes. And a check engine light appears. However the 120V level1 Evse works fine, flawless as always. Any ideas?