C0800
ChassisStarting Charginghigh severityDevice Power Circuit Malfunction
What C0800 Means
The control module has detected a problem with its power supply voltage, often too low or unstable. This can affect operation of safety and body systems tied to that module.
Symptoms
- Warning lights on dash
- Intermittent system faults
- Module resets or dropouts
Common Causes
- Weak or failing battery
- Corroded or loose power/ground connections
- Faulty wiring to the module
- Failed control module
Diagnostic Steps
- Test battery voltage and charging system
- Inspect module power and ground connections
- Check wiring for corrosion or damage
- Measure voltage at module supply pin
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