U3008Control Module Ground A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Modules that switch large currents are often grounded through two separate wires, and U3008 marks the loss of ground A. GM's 19OBDG03B brake module measures the voltage on both grounds and forms (G1 − G2)/(G1 + G2); each wire should carry half the current, so a result above 0.9 for 200 ms means ground 1 is gone, Type A with MIL. Ford's TSB 26-2150 for 2025–2026 Explorer, Police Interceptor and Aviator ties U3008:1B in the steering module, the byte meaning resistance too high, to ground G104 or G116 on the passenger frame rail; the repair enlarges the hole and fits a self-tapping M8 bolt. On the road this shows as a steering assist warning and heavier steering. Mazda uses U3008:01 on CX-90 and CX-70 plug-in hybrids for an over-current or voltage fault in the backup power unit instead.
- What you may notice
- Steering assist or brake system warning in the cluster
- Reduced power steering assist or limited ABS function
- Check engine light where the maker classes it as MIL-relevant
- Likely causes
- LikelyLoose or poorly clamped ground eyelet at the body or frame
- PossibleCorrosion or paint under the ground connection raising resistance
- RareBroken or chafed ground wire A in the harness
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.