Posts Tagged: generator field control circuit

What the P0622 Code Means and How to Fix It Fast

P0622 Code: Why Your Alternator Isn’t Charging Properly Quick Summary The P0622 code indicates a malfunction in the generator field control circuit. In simple terms, the engine computer (PCM or ECM) is not able to properly control the alternator’s field circuit, which regulates battery charging. In practical terms, it means the engine computer cannot properly monitor or control the alternator’s output. If ignored, a P0622 code can eventually lead to a dead battery and vehicle stalling because the charging system cannot properly regulate voltage. Article What the P0622 Code Really … Read More