Error code
OBD2 U0406
OBD2U0406
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Invalid Data Received From Fuel Injector Control Module.
Severity
moderateCan be driven, but performance issues may occur.
Summary
U0406 indicates that the ECU is receiving invalid data from the fuel injector control module, which could affect engine performance. This issue involves the communication between the ECU and the fuel system.
Common Causes
- Faulty or damaged wiring harness connecting the ECU to the fuel injector control module
- Malfunctioning fuel injector control module
- Corrupted software in the fuel injector control module
Fixes
- Replace or repair faulty wiring harness and/or fuel injector control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
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- U0407Invalid Data Received From Glow Plug Control Module
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- U0409Invalid Data Received From Alternative Fuel Control Module
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