The problem of the engine P1862 Code is related with the coolant loss. Generally, it is the most common reason of overheating the car engine and creating several problems. If your engine overheats recurrently, the high heat can make consequence in permanent damage what can be a pain to repair. Deterrence is the best medicine what can solve many problems. So avoid this kind of impairment what occurred in the car engine by making unquestionable the coolant is fresh and the cooling system is in good working condition. Do not try to fix the car engine by non-machinal person who has less idea.