C1220 – OBD-II DTC

OBD-II DTC C1220 – Lamp ABS Warning Output Circuit Short To Battery

DTC C1220 meaning

DTC C1220 refers to a diagnostic trouble code indicating a short circuit in the ABS warning lamp output circuit to the battery. This code is specific to the Anti-lock Braking System (ABS) and suggests that there is an electrical issue affecting the ABS warning light functionality.

DTC C1220 symptoms

Common symptoms associated with DTC C1220 may include:

• ABS warning light illuminated on the dashboard
• Potential loss of ABS functionality
• Increased stopping distances due to non-functioning ABS
• Possible additional warning lights related to braking system issues

DTC C1220 causes

Several factors can lead to the occurrence of DTC C1220, including:

• Short circuit in the ABS warning lamp circuit
• Faulty ABS control module
• Damaged wiring or connectors in the ABS system
• Corrosion or poor connections at the ABS module or related components

DTC C1220 seriousness

DTC C1220 is considered serious as it indicates a malfunction in the ABS system. The ABS is crucial for maintaining vehicle control during hard braking, and a failure in this system can lead to:

• Increased risk of skidding or loss of control
• Longer stopping distances
• Potential safety hazards for the driver and others on the road

How to diagnose DTC C1220

To diagnose DTC C1220, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1220.
2. Inspect the ABS warning lamp circuit for visible damage or corrosion.
3. Check the wiring and connectors for continuity and proper grounding.
4. Test the ABS control module for proper operation.
5. Clear the DTC and perform a road test to see if the code reappears.

How to fix DTC C1220 step-by-step instructions

To fix DTC C1220, follow these steps:

1. Inspect the ABS warning lamp circuit for any signs of damage or short circuits.
2. Repair or replace any damaged wiring or connectors found during inspection.
3. Test the ABS control module and replace it if it is found to be faulty.
4. Ensure all connections are clean and secure to prevent future issues.
5. Clear the DTC using an OBD-II scanner and perform a road test to verify the fix.

How to erase DTC C1220

To erase DTC C1220, 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 trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.