u1066 loss of communication with rear integrated module

OBD2 Code: U1066

Description: Loss of Communication with Rear Integrated Module

Definition: This code indicates that the vehicle’s main control module has lost communication with the rear integrated module, which can affect various functions related to the rear of the vehicle.

U1066 – Loss of Communication with Rear Integrated Module

Typical Severity: Moderate

Common Causes

U1066 – Loss of Communication with Rear Integrated Module

Common Causes:

• Faulty rear integrated module
• Wiring issues such as open circuits or short circuits
• Poor electrical connections
• Software glitches in the vehicle’s communication network

 

Common Misdiagnosis

Loss of communication with rear integrated module – Common Misdiagnosis: Faulty wiring or connectors are often misdiagnosed as a failed rear integrated module.

 

Common Diagnostic Steps

Description: Loss of communication with rear integrated module

• Check for any other stored codes that might indicate a broader network issue.
• Inspect the wiring and connectors between the rear integrated module and the main communication bus for damage or corrosion.
• Verify power and ground connections to the rear integrated module.
• Use a scan tool to check for proper communication signals on the CAN bus network.
• If possible, update or reprogram the software in the rear integrated module.
• If no issues are found, consider replacing the rear integrated module as a last resort.