P305B BUICK - DC/DC Converter Ignition On/Start Switch Circuit High Voltage
- Faulty Power Supply Transformer
- Power Supply Transformer harness is open or shorted
- Power Supply Transformer circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P305b Buick DescriptionThe Body Control Module (BCM) controls the ignition main relay through the control circuit by applying voltage to the circuit. The power supply transformer samples the system voltage on the Ignition 1 voltage circuit from the ignition main relay. If the Power Supply Transformer detects a fault in the circuit it will request the Engine Control Module (ECM) to set the Diagnostic Trouble Code (DTC) and illuminate the Malfunction Indicator Light/Lamp (MIL).
Need more help?Get the P305b Buick code diagnosed by a professional: Find a repair shop in your area
P305B BUICK CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P305b Buick code? Have you replaced any parts?
Any information is appreciated. Thanks