OBD-II code · Network (extended)
U3006 Control Module Input Power A Circuit/Open
Open circuit on the input power line A of the control module. The module is missing or losing its main supply on this rail.
Is it safe to drive with U3006?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply fuse blown
- PossiblePower wiring break
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Module Power A, Fuse, Power Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.