TuningBot DTC Database · v4.37.14
Generic (OBD-II) interpretation in the TuningBot DTC database.
The control module stopped receiving expected network messages from the Coolant Pump “A” node on the vehicle communication bus.
Network: communication between control units.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Lost Communication With Coolant Pump “A”. The control module stopped receiving expected network messages from the Coolant Pump “A” node on the vehicle communication bus.
U0623 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
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 U0623 is removable in your case.
Understand the system behind this code: Diagnostic Strategy and DTC Logic
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