P06B4 OBD-II: Sensor Power Supply "B" Circuit Low

OBD II Fault Code

• OBD II P06B4

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Sensor Power Supply "B" Circuit Low

The engine computer (PCM) supplies power to all the sensors on the vehicle. If there is a problem with the power supply to the sensors, code P06B4 will be set.

Common Problems That Trigger the P06B4 Code

• Powertrain Control Module (PCM) failure
• Wiring issue