Error code
OBD2 U0425
OBD2U0425
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Invalid Data Received From Auxiliary Heater Control Module.
Severity
moderateCan drive, but may experience reduced functionality of the auxiliary heating system.
Summary
U0425 indicates that the auxiliary heater control module is sending invalid data to the car's computer. This issue affects the communication between the auxiliary heater system and the vehicle’s main computer.
Common Causes
- Faulty auxiliary heater control module
- Communication issues with the auxiliary heater control module
Fixes
- Replace or repair the faulty auxiliary heater control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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