The control module stopped receiving expected network messages from the Engine Coolant Temperature Sensor 5 node on the vehicle communication bus.
TuningBot DTC Database · v4.37.15
U0631 Lost Communication With Engine Coolant Temperature Sensor 5
Generic (OBD-II) interpretation in the TuningBot DTC database.
What U0631 means
Related and nearby codes
How to read U0631
Network: communication between control units.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about U0631
What does U0631 mean?
Lost Communication With Engine Coolant Temperature Sensor 5. The control module stopped receiving expected network messages from the Engine Coolant Temperature Sensor 5 node on the vehicle communication bus.
Is U0631 generic or manufacturer-specific?
U0631 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove U0631 at file level?
Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U0631 is removable in your case.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
