ezOBD2 - Free OBD2 Code Lookup and Check Engine Light Diagnostic Tool

Diagnose Your Check Engine Light

Enter OBDII code below:

Code C1099

Symptoms

• ABS warning light illuminated

• Loss of anti-lock braking system functionality

• Unusual braking behavior

Common Causes

• Faulty Brake System Control Module

• Corrupted software in the module

• Electrical issues such as poor connections or damaged wires

Glossary

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.

Related Codes

• C1098

• C1100

Laymans terms

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.

Explanation

This code indicates that there is an error with the Read Only Memory (ROM) in the Brake System Control Module.

Technical description

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.

Diagnosis steps

• 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 procedures

• Repair or replace damaged wiring or connectors.

• Reprogram or update the Brake System Control Module software.

• Replace the Brake System Control Module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$300 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly update vehicle software.

• Conduct routine inspections of the brake system.

• Ensure proper electrical connections and wiring integrity.

Error code type

Brake System Control Issue

User experience recommendations

• 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.

Warranty information

Check with the vehicle manufacturer for warranty coverage on the brake system components.

Historical data

This code has been associated with vehicles experiencing intermittent ABS functionality issues, often due to software glitches.

Urgency level

High – This issue affects the braking system, which is critical for vehicle safety.

Legal and safety notice

Driving with a malfunctioning brake system can be dangerous and may violate vehicle safety regulations.

Testing conditions

• Vehicle parked on a level surface

• Ignition in the ON position

Component location

The Brake System Control Module is typically located near the brake pedal or within the engine bay, depending on the vehicle model.

FAQs

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.

Last updated: Jun 8, 2026 • Source: internal database
🌙