Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The computer that helps control your car's brakes has a memory problem, like when your game console can't load a game because of a glitch.
This code indicates that there is an error with the Read Only Memory (ROM) in the Brake System Control Module.
The C1099 code is triggered when the Brake System Control Module detects an error in its Read Only Memory (ROM). This memory is crucial for storing the software that controls the brake system functions. An error could mean corrupted data or a malfunction in the memory chip.
• ABS warning light illuminated
• Loss of anti-lock braking system functionality
• Unusual braking behavior
• Faulty Brake System Control Module
• Corrupted software in the module
• Electrical issues such as poor connections or damaged wires
ROM: Read Only Memory, a type of storage used in computers and other electronic devices.
ABS: Anti-lock Braking System, a safety system that prevents wheels from locking up during braking.
• Use an OBD-II scanner to confirm the C1099 code.
• Inspect the wiring and connections to the Brake System Control Module.
• Check for any software updates or reprogramming needs for the module.
• Repair or replace damaged wiring or connectors.
• Reprogram or update the Brake System Control Module software.
• Replace the Brake System Control Module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$300 - $800
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly update vehicle software.
• Conduct routine inspections of the brake system.
• Ensure proper electrical connections and wiring integrity.
Brake System Control Issue
• Do not ignore the ABS warning light; seek professional help.
• Avoid hard braking until the issue is resolved.
• Schedule regular maintenance to prevent future issues.
Check with the vehicle manufacturer for warranty coverage on the brake system components.
This code has been associated with vehicles experiencing intermittent ABS functionality issues, often due to software glitches.
High – This issue affects the braking system, which is critical for vehicle safety.
Driving with a malfunctioning brake system can be dangerous and may violate vehicle safety regulations.
• Vehicle parked on a level surface
• Ignition in the ON position
The Brake System Control Module is typically located near the brake pedal or within the engine bay, depending on the vehicle model.
Q: Can I drive with a C1099 code?
A: It's not recommended to drive with this code active, as it affects the braking system's safety features.
Q: Will clearing the code fix the problem?
A: Clearing the code may temporarily remove the warning light, but it won't fix the underlying issue.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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