u016e u016e control module communication failure

OBD2 Code: U016E

Description: Lost Communication With Auxiliary Heater Control Module “A”

Definition: This code indicates that the vehicle’s main computer (PCM) has lost communication with the auxiliary heater control module. The auxiliary heater is responsible for providing additional heat to the cabin or engine, and a loss of communication can affect its operation.

• U016E: Lost Communication With Generic Electronic Module 2 (GEM2) – Severity: Moderate
• U016E: Lost Communication With Vehicle Immobilizer Control Module – Severity: Moderate

Common Causes

– U016E: Lost Communication with Generic Electronic Module

Common causes:
– Faulty wiring or connectors
– Failed generic electronic module
– Network communication issues

 

Common Misdiagnosis

Description: Control Module Communication Failure

Common Misdiagnosis: Faulty control module replacement without checking for wiring issues or connector problems.

 

Common Diagnostic Steps

OBD2 Code: U016E
Description: Control Module Communication Failure
Common Diagnostic Steps:

• Verify the code is active by clearing it and performing a road test.
• Inspect all related wiring harnesses and connectors for damage, corrosion, or disconnection.
• Check the power and ground circuits of the affected control module using a multimeter.
• Use a scan tool to check for additional codes that may indicate other communication issues.
• If possible, update or reprogram the software of the affected control module.
• If no faults are found in wiring or connections, consider replacing the control module after verifying it’s faulty with manufacturer-specific diagnostic procedures.