981/911

2015 Cayman S track only except drive to events. Had left cat, O2 sensors, coils on 4 and 5 replaced after an on track failure. Porsche fixed everything under warrantee. Car runs fine, no dash lights on. Both my accessport and durametric show code P1671 Unit injector solenoid-valve cylinder 6-N245 Electrical malfunction in circuit valve below lower limit,. I can clear the code on both devices, but when car is restarted they code reappears on both devices. I have an apt to have dealer put their engine reader on it. Is this part in the process of failing?