u1142 u1142 module communication failure
What it means:
OBD2 Code: U1142
Description: Module Communication Failure
The OBD-II code U1142 indicates a communication failure between control modules in the vehicle. This can occur due to issues such as faulty wiring, defective connectors, or malfunctioning control modules that disrupt the data exchange necessary for proper vehicle operation.
Common Causes:
OBD2 Code: U1142
Description: Module Communication Failure
Common Causes:
- Faulty or damaged wiring harness
- Poor electrical connections in the module circuit
- Defective control module
- Software issues within the module
- Network communication errors between modules
- Corroded or loose connectors and terminals
Common Misdiagnosis:
OBD2 Code: U1142
Description: Module Communication Failure
Common Misdiagnosis:
- Faulty wiring or connectors assumed to be the primary issue without checking for software updates.
- Replacing modules unnecessarily when the problem is due to a network communication error.
- Assuming a specific module failure instead of inspecting the entire communication bus system.
Common Diagnostic Steps:
OBD2 Code: U1142
Description: Module Communication Failure
Common Diagnostic Steps:
- Verify the code using an OBD-II scanner and check for any additional codes that may be present.
- Inspect the wiring and connectors related to the communication network for signs of damage, corrosion, or disconnection.
- Check the power and ground connections to the affected module to ensure they are secure and functioning properly.
- Test the communication lines (CAN bus) between modules using a multimeter or oscilloscope to identify any breaks or shorts in the circuit.
- If applicable, update or reprogram the software in the affected module as per manufacturer recommendations.
- If no issues are found with wiring or connections, consider replacing the affected module after verifying it is faulty through further testing.