C1140 – OBD-II DTC

OBD-II DTC C1140 – Hydraulic Base Brake Failure

DTC C1140 meaning

DTC C1140 refers to a Hydraulic Base Brake Failure, indicating a malfunction within the hydraulic braking system. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper operation. When this code is triggered, it suggests that the brake system is not functioning as intended, potentially compromising vehicle safety.

DTC C1140 symptoms

Common symptoms associated with DTC C1140 may include:

• Illuminated brake warning light on the dashboard
• Reduced braking performance or responsiveness
• Unusual noises when applying brakes
• Increased brake pedal travel
• Brake fluid leaks

DTC C1140 causes

Several factors can lead to the activation of DTC C1140, including:

• Faulty hydraulic brake components
• Low brake fluid levels
• Air in the brake lines
• Malfunctioning brake master cylinder
• Worn or damaged brake pads or rotors
• Electrical issues affecting the brake system

DTC C1140 seriousness

DTC C1140 is considered a serious issue as it directly impacts the vehicle’s braking system. A failure in the hydraulic brake system can lead to:

• Increased stopping distances
• Loss of control during braking
• Higher risk of accidents

It is crucial to address this code promptly to ensure the safety of the vehicle and its occupants.

How to diagnose DTC C1140

To diagnose DTC C1140, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1140 code.
2. Inspect the brake fluid level and top it off if necessary.
3. Check for any visible leaks in the brake lines and components.
4. Examine the brake pads and rotors for wear or damage.
5. Test the brake master cylinder for proper operation.
6. Look for air in the brake lines and perform a brake bleed if needed.
7. Inspect electrical connections related to the brake system.

How to fix DTC C1140 step-by-step instructions

To fix DTC C1140, follow these step-by-step instructions:

1. Ensure the vehicle is safely lifted and secured.
2. Check and refill the brake fluid to the recommended level.
3. Inspect and replace any damaged brake lines or components.
4. Replace worn brake pads and rotors as necessary.
5. Repair or replace the brake master cylinder if it is faulty.
6. Bleed the brake system to remove any trapped air.
7. Reconnect any loose or damaged electrical connections.
8. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC C1140

To erase DTC C1140, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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