C0800
Control Module Power Circuit
C0800 is an OBD-II diagnostic trouble code meaning: Control Module Power Circuit. Common causes: open or short circuit in wiring harness, poor contact in the control unit connectors. Estimated repair cost: $22–167.
Symptoms
- Unpredictable behavior of vehicle systems
- Lost connection with diagnostic equipment
- Check Engine Light Is On
- Failure of individual vehicle functions
Causes
- Open or short circuit in wiring harness
- Poor contact in the control unit connectors
- Faulty relay or fuse
- Alternator or battery problems
- Damage to the control unit itself
How to Fix
- Check the condition of the battery and generator
- Inspect the fuses and relays associated with the control unit
- Check the integrity of the wiring harness and the quality of contacts
- Test the control unit for internal faults
- Replace damaged components if necessary
Related codes
Error C0800 by Vehicle Brand
FAQ
What does the C0800 code mean?
C0800 is an OBD-II diagnostic trouble code that indicates: Control Module Power Circuit
What causes a C0800 error code?
The most common causes of C0800 include: Open or short circuit in wiring harness; Poor contact in the control unit connectors; Faulty relay or fuse; Alternator or battery problems.
How do I fix a C0800 diagnostic trouble code?
To fix C0800: Check the condition of the battery and generator. Inspect the fuses and relays associated with the control unit. Check the integrity of the wiring harness and the quality of contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0800?
Limited driving only, diagnose soon
How much does it cost to fix C0800?
The estimated repair cost for C0800 is $22–167. Actual cost depends on your vehicle, location, and labor rates.
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