P0AFF – System Voltage Too Low for Voltage Step Down Conversion

P0AFF Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0AFF Possible Causes

Faulty Hybrid Battery Pack,Hybrid Battery Pack harness is open or shorted,Hybrid Battery Pack circuit poor electrical connection

P0AFF Description

The Engine Control Module (ECM) monitors the Hybrid Battery System Voltage. The ECM sets the OBDII code when the Hybrid Battery System Voltage signal is out of factory specifications.