U3007 code meaning
Control Module Input Power B Circuit/Open
Network system Generic code U30xx codes Check engine light
What U3007 means
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.
U3007 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U3007
- 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
Common causes of U3007
- Most 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
- Less likelyValve power switch or internal supply path in the module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Module power bFusePower wiring
What each part of U3007 means
| U | Network system: communication between the control modules (CAN bus). |
| 3 | Reserved range, usually generic. |
| 07 | The exact fault in that area. |
What to do next
- Note U3007 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U3007
What does U3007 mean?
U3007 means "Control Module Input Power B Circuit/Open". U3007 is the partner code for the second battery feed, B. It is a generic code, so it means the same on every make.
Is it safe to drive with U3007?
Drive gently and only to a workshop. With U3007 the car can go into limp mode (reduced power) to protect itself.
Will U3007 fail an emissions test?
U3007 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U3007 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U3007 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.