u1161 lost communications with front passenger door module

OBD2 Code: U1161

Description: Lost Communications with Front Passenger Door Module

Definition: This code indicates that the vehicle’s main control module has lost communication with the front passenger door module. This could be due to a wiring issue, a faulty door module, or a problem with the network communication system.

: Lost communication with front passenger door module – Severe

Common Causes

U1161 – Lost Communication with Front Passenger Door Module

Common Causes:

• Faulty front passenger door module
• Wiring or connection issues between the module and the main vehicle network
• Power or ground supply problems to the front passenger door module
• Software issues within the module causing communication failure

Common Misdiagnosis

Lost Communications with Front Passenger Door Module – Common Misdiagnosis: Faulty door module assumed when the issue is often due to wiring problems or a faulty connector.

Common Diagnostic Steps

Lost Communications with Front Passenger Door Module

• Check for any other related trouble codes that may indicate a broader communication issue.
• Inspect the wiring harness and connectors between the front passenger door module and the main control unit for damage or corrosion.
• Ensure all connectors are securely connected and free from moisture or debris.
• Test the power supply and ground connections to the front passenger door module using a multimeter.
• Verify that there is no blown fuse related to the door module circuit.
• If equipped, use a scan tool to attempt communication with the front passenger door module directly.
• Update or reflash the vehicle’s software if recommended by manufacturer service bulletins.
• If all else fails, consider replacing the front passenger door module after confirming it as faulty through diagnostic testing.