U3007Control Module Input Power B Circuit/Open
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- U3007 is the partner code for the second battery feed, B. In GM's 25OBDG04B brake module B is KL30_2, the supply for the valve coils: the module compares it with KL30_1 and sets U3007 when it stays below 53.85 % of that value for 75 ms, and also when the switch for valve power reports less than half the supply voltage for 50 ms; Type B with MIL. The other GM brake supplier (25OBDG03B) uses U3007 differently, for charge-pump tests that could not run three times because both internal supply paths were in undervoltage. So B is a separate fused feed, not a backup of A, and a fault on B alone points to its own fuse or pin. Jeep's 08-106-21 for the 2021 Wrangler 4xe lists U3007-00 first among codes cured by charging or replacing the 12 V battery.
- What you may notice
- ABS and stability control warnings, functions shut off
- Check engine light on in some vehicles
- Often stored together with U3006 when the battery is weak
- Likely causes
- LikelyBlown or poorly seated fuse feeding input B
- PossibleLow battery voltage making feed B fail the comparison
- PossibleDamaged wire or spread terminal on supply B
- RareValve power switch or internal supply path in the module faulty
- 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.