U3006Control Module Input Power A Circuit/Open
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Modules with heavy loads often take more than one battery feed, and U3006 says feed A is missing or open. Which pin is A depends on the maker. In one GM brake module (25OBDG04B) feed A means KL30_1, which supplies the pump motor: if it falls below 53.85 % of the second feed KL30_2 for 75 ms, a blown fuse or short to ground is assumed, Type B with MIL. A second GM brake supplier (25OBDG03B) sets U3006 when the motor supply is under 5 V before the start-up motor test, also Type B. Both feeds there are permanent battery positive, not an ignition line. Jeep's 08-106-21 lists U3006-00 next to U3007-00 on 2021 Wrangler 4xe with a weak 12 V battery and MIL, and Mazda's SA-023-23 shows U3006:01 in the CX-5 parking brake module after battery drain.
- What you may notice
- ABS, stability or parking brake warning lamps on
- Function of the module limited or switched off
- Check engine light on in some vehicles
- Likely causes
- LikelyBlown or loose fuse in the feed A path
- PossibleDischarged 12 V battery pulling the feed below the check limit
- PossibleCorroded terminal, loose pin or chafed wire on supply A
- RareInternal power switch or board fault in the module
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.