Probable Root Cause

• Open in CAN "High" line
• Open in CAN "Low" line
• Short between CAN "High" and "Low" line
• Poor contact, bending, corrosion, deterioration, or damage of CAN "High" or "Low" line connector/wire harness

CAN BUS OFF: Communication failure_Open/short in main line_Short in branch line 

• Power short in CAN "High" line
• Ground short in CAN "High" line
• Power short in CAN "Low" line
• Ground short in CAN "Low" line
• Open in both CAN "High" and "Low" line
• Ground short in both CAN "High" and "Low" line

CAN Time Out: Communication failure for the control module_Poor power supply to control modulePoor contact in main line 

• Control module connector is missing
• Faulty power supply to control module
• Open/poor contact in CAN "High" line
• Open/poor contact in CAN "Low" line