C0099
ABS Control Module Internal Fault
The ABS control module fails its internal self-test (RAM, ROM or processor watchdog). ABS and stability control are disabled.
The ABS control module fails its internal self-test (RAM, ROM or processor watchdog). ABS and stability control are disabled.
Common causes
- high
Module internally failed
One of the most commonly reported causes for this code — check this first.
Typical part cost: $440-1760
- medium
Power supply undervoltage during operation
A plausible cause — test and verify before replacing parts.
Typical part cost: $440-1760
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does C0099 mean?
C0099 means "ABS Control Module Internal Fault". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C0099?
module internally failed; power supply undervoltage during operation — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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