U0003 Buick High Speed Controller Area Network (CAN) Communication Bus (+) Open

U0004 Buick High Speed Controller Area Network (CAN) Communication Bus (+) Low

OBD Code:
System:
Subsystem:
 U0004 Buick – (ASE)
 Network Communication
 Fuel & Air metering, Auxiliary emission controls

Trouble Code Description: High Speed Controller Area Network (CAN) Communication Bus (+) Low


Location:
Analysis:

Possible Causes:

 
 

 

Tech description:

Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera