C1225 – OBD-II DTC

OBD-II DTC C1225 – Lamp Brake Warning Output Circuit Short To Battery

DTC C1225 meaning

DTC C1225 refers to a diagnostic trouble code indicating a fault in the Lamp Brake Warning Output Circuit. Specifically, it signifies that there is a short circuit in the brake warning lamp circuit that is connected directly to the battery. This can lead to the brake warning light being illuminated on the dashboard, indicating a potential issue with the braking system.

DTC C1225 symptoms

Common symptoms associated with DTC C1225 may include:

• Illumination of the brake warning light on the dashboard
• Possible malfunction of the brake system
• Inconsistent brake performance
• Increased brake pedal travel

DTC C1225 causes

The causes of DTC C1225 can vary, but typical reasons include:

• Short circuit in the brake warning lamp circuit
• Faulty brake warning lamp
• Damaged wiring or connectors in the circuit
• Malfunctioning brake system components

DTC C1225 seriousness

DTC C1225 is considered a serious issue as it directly relates to the vehicle’s braking system. If the brake warning light is illuminated, it may indicate that the braking system is not functioning correctly, which can compromise vehicle safety. It is crucial to address this code promptly to ensure safe operation of the vehicle.

How to diagnose DTC C1225

To diagnose DTC C1225, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1225.
2. Inspect the brake warning lamp and its circuit for any visible damage.
3. Check the wiring and connectors for signs of wear, corrosion, or short circuits.
4. Test the brake warning lamp for proper operation.
5. Examine the brake system components for any malfunctions.
6. Clear the DTC and perform a road test to see if the code returns.

How to fix DTC C1225 step-by-step instructions

To fix DTC C1225, follow these steps:

1. Identify and repair any damaged wiring or connectors in the brake warning lamp circuit.
2. Replace the brake warning lamp if it is found to be faulty.
3. Ensure all connections are secure and free from corrosion.
4. Inspect and repair any malfunctioning brake system components.
5. Clear the DTC using an OBD-II scanner.
6. Test drive the vehicle to ensure the issue is resolved and the warning light does not reappear.

How to erase DTC C1225

To erase DTC C1225, follow these steps:

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

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.