C1198 – OBD-II DTC

OBD-II DTC C1198 – ABS Inlet Valve Coil LF Circuit Failure

DTC C1198 meaning

DTC C1198 refers to a fault in the Anti-lock Braking System (ABS) related to the inlet valve coil for the left front wheel. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected a malfunction in the electrical circuit associated with the inlet valve coil. The inlet valve is crucial for controlling brake fluid flow to the brake caliper, and any failure in this circuit can affect the overall performance of the ABS system.

DTC C1198 symptoms

Common symptoms associated with DTC C1198 may include:

• Illumination of the ABS warning light on the dashboard
• Decreased braking performance, especially during hard braking
• Inconsistent or erratic ABS operation
• Potential activation of the traction control system warning light

DTC C1198 causes

Several factors can lead to the occurrence of DTC C1198, including:

• Faulty inlet valve coil for the left front wheel
• Wiring issues, such as frayed or damaged wires in the inlet valve circuit
• Corrosion or poor connections in the electrical connectors
• Malfunctioning ABS control module
• Blown fuses related to the ABS system

DTC C1198 seriousness

DTC C1198 is considered a serious issue as it directly impacts the vehicle’s braking system. If the ABS is not functioning correctly, it can lead to reduced braking efficiency, especially in slippery conditions. This can increase the risk of accidents. Therefore, it is essential to address this code promptly to ensure safe vehicle operation.

How to diagnose DTC C1198

To diagnose DTC C1198, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1198.
2. Inspect the ABS system wiring and connectors for any visible damage or corrosion.
3. Check the inlet valve coil for continuity using a multimeter.
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 C1198 step-by-step instructions

To fix DTC C1198, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors related to the inlet valve coil.
3. If the inlet valve coil is faulty, replace it with a new one.
4. Check and replace any blown fuses associated with the ABS system.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Perform a road test to verify that the ABS system is functioning correctly and that the DTC does not return.

How to erase DTC C1198

To erase DTC C1198, 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. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and perform a test drive to ensure the code does not reappear.

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