What does it mean?
U3023 is a Network and Communication (CAN bus, module communication) fault code. It indicates: Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation.
Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation
Severity
Medium
Can I keep driving?
Usually drivable, but get it diagnosed without delay.
How is this code read?
This is a standard OBD-II code; any basic scanner reads it on vehicles built after 2004.
- UNetwork
- 3Manufacturer-specific
- 0Network / Communication
- 23Sequence number
Codes From the Same System
All Fault Codes- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
Related Similar Codes
- U3020Control Module Wake-up Circuit B High
- U3021Control Module Wake-up Circuit B Performance
- U3022Ignition Input Accessory/Off
- U3024Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation
- U3025Control Module A Disable Circuit/Open
- U3026Control Module A Disable Circuit Low
- U3027Control Module A Disable Circuit High
- U3028Control Module A Disable Feedback Circuit
This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.