P3012 – Battery Block 2 Becomes Weak

P3012 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P3012 Possible Causes

Faulty HV battery assembly,Faulty Battery ECU

P3012 Description

If there is an abnormal internal resistance or electromotive voltage in the hybrid battery blocks, the hybrid battery Electronic Control Unit (ECU) determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU illuminates the MIL and sets a Diagnostic Trouble Code (DTC).