C0800Device Power 1 Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Generic code lists omit C0800, but GM uses it widely for the supply voltage that a chassis module sees, often the brake control module. Saab workshop pages for the 2011 models list the subcodes are 03 below threshold, 07 above, 0D high resistance and 11 high input; the module flags a supply under roughly 9 V or over 18 V lasting about 5 s and may switch itself off. Saab's 2009 9-3 ESP unit sets 03 under 8 V for 0.5 s, or under 9.5 V above 15 km/h, and drops ABS and ESP. GM bulletins tie it to a loose negative cable on the 2011-15 Cruze (PI1398A), to faults reproducible under heavy electrical load (PIC6037) and to poor connections on 2014-17 trucks (PIT5405C); on the 2013 LaCrosse and Malibu wheel speed faults come first (PIC5837). It is not a drive system low voltage code.
- What you may notice
- ABS, traction and stability warnings light up, sometimes only briefly
- Radio or displays switch off and on, lights flicker
- Heavier steering at low speed on vehicles with electric power steering
- Likely causes
- LikelyLoose or corroded battery cable or ground connection (GM PI1398A)
- PossibleWeak battery or charging system fault, also after jump start or charger use
- PossibleHigh resistance in the module's supply or ground circuit
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.