OBD-II code · Chassis
C0800 Drive System Voltage Low
The chassis control module has detected that the supply voltage is below the operating threshold required for ABS, ESP or steering systems. Many chassis functions are limited or disabled until the voltage returns to a normal range.
Is it safe to drive with C0800?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBattery weak or discharged
- PossibleAlternator output fault
- Less likelyHigh-resistance ground or supply connection
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Battery, Alternator, Power Supply Wiring, Chassis Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.