Toyota C0246 OBD Check Engine DTC Troubleshooting Guide

Toyota C0246 OBD DTC Troubleshooting Guide

In this Toyota C0246 OBD DTC Troubleshooting Guide, we’ll provide essential information and steps to help you identify, diagnose, and fix Diagnostic Trouble Code (DTC) C0246. This code is linked to an issue in the Electronic Brakeforce Distribution (EBD) relay circuit within your Toyota’s Anti-lock Brake System (ABS). Addressing this problem is vital for maintaining the safety and reliability of your vehicle’s brakes.

In this guide, we’ll cover common symptoms, possible causes, and locations related to DTC C0246. We’ll also give you detailed instructions on the diagnostic process, required tools, and how to clear the code once the issue has been resolved. By learning about DTC C0246, you can keep your Toyota safe and reliable on the road. Remember to seek professional help if you’re unsure about any aspect of the diagnosis or repair process.

Toyota OBD DTC C0246

✅Parts Number

The parts number for the component associated with DTC C0246 may vary depending on the vehicle model and year. It is essential to refer to your vehicle’s service manual or contact your local Toyota dealer for the specific part number.


DTC C0246 is a diagnostic trouble code related to the Anti-lock Brake System (ABS) and Electronic Brakeforce Distribution (EBD) control system. This code indicates a problem with the EBD relay circuit’s malfunction, typically caused by a faulty relay or an issue in the relay circuit.

In Toyota models, the Electronic Brakeforce Distribution (EBD) system is typically integrated into the Anti-lock Brake System (ABS) module rather than having a separate EBD relay. The ABS module controls both the ABS and EBD functions, adjusting brake pressure to each wheel as needed for optimal braking performance.

If you encounter a problem related to the EBD system in your Toyota car, it is more likely to be associated with the ABS module, wheel speed sensors, or related wiring and connections. To diagnose the issue, use an OBD-II scanner to check for any stored diagnostic trouble codes and follow the appropriate troubleshooting procedures outlined in your vehicle’s service manual.


  1. ABS warning light: The ABS warning light on the dashboard may illuminate to indicate a problem with the ABS or EBD system.
  2. Brake warning light: The brake warning light may also illuminate on the dashboard, signaling an issue with the brake system.
  3. Poor brake performance: You might notice that your vehicle’s braking performance is reduced, potentially causing longer stopping distances.
  4. Uneven brake force distribution: The EBD system’s malfunction can lead to uneven brake force distribution across the wheels, which may result in a pulling sensation during braking or uneven brake pad wear.
  5. Unusual brake pedal feel: The brake pedal may feel spongy, soft, or difficult to depress due to the malfunction in the EBD system.


Possible causes of DTC C0246 include:

  1. Faulty ABS module: The ABS module, which also controls the EBD system, may have an internal fault or failure, causing the DTC C0246 to appear.
  2. Wiring issues: Damaged or corroded wiring within the EBD relay circuit can trigger this code. Inspect the wiring for any signs of damage or wear.
  3. Poor electrical connections: Loose, corroded, or damaged connectors within the EBD relay circuit or ABS module can cause intermittent or faulty signals, leading to DTC C0246.
  4. Faulty wheel speed sensors: Although not directly related to DTC C0246, a malfunctioning wheel speed sensor can cause issues with the ABS and EBD systems, leading to poor brake performance or related trouble codes.

✅Possible Location

When diagnosing Toyota OBD DTC C0246, which relates to a malfunction in the Electronic Brakeforce Distribution (EBD) relay circuit, the possible locations to inspect include:

  1. ABS Control Module: The ABS control module is typically located in the engine compartment. It may be mounted on the inner fender, firewall, or near the brake master cylinder. This module controls both ABS and EBD functions, and a fault in the module could cause DTC C0246.
  2. Wheel Speed Sensors: The wheel speed sensors are located at each wheel hub or bearing assembly. These sensors provide crucial data to the ABS and EBD systems, and a malfunctioning sensor could impact the overall performance of these systems.
  3. Wiring and Connectors: Inspect the wiring and connectors related to the ABS and EBD systems, focusing on the connections between the ABS control module, wheel speed sensors, and other components in the system.
  4. Fuse and Relay Box: Check the engine compartment fuse and relay box for any fuses or relays associated with the ABS and EBD systems. Although DTC C0246 specifically refers to the EBD relay circuit, the relay itself may not be present in some Toyota models, as the ABS module controls the EBD function.

✅How to Fix the Problem

  1. Visually inspect the EBD relay and its connections for any signs of damage or corrosion
  2. Test the EBD relay using a multimeter or by swapping it with a known good relay
  3. Check the wiring and connectors in the EBD relay circuit for any issues
  4. If necessary, replace the faulty EBD relay
  5. Finally, if all else fails, have the ABS control module inspected by a professional technician

✅How Difficult to Fix

Fixing DTC C0246 can range from simple to moderately challenging, depending on the cause of the issue. Replacing the relay or fixing wiring issues can typically be done by a DIY enthusiast with some automotive knowledge. However, diagnosing or repairing an ABS control module issue may require professional assistance.

✅Can You Drive With This Code

Driving with DTC C0246 is not recommended, as it could compromise your vehicle’s braking performance, potentially leading to unsafe driving conditions and an increased risk of accidents.

✅How to Clear the Code

To clear the Toyota OBD DTC C0246 from your vehicle, follow these steps:

  1. Address the root cause: Before clearing the code, ensure that you have diagnosed and repaired the underlying issue causing the DTC C0246. Simply clearing the code without fixing the problem may cause the code to reappear and potentially lead to further damage or unsafe driving conditions.
  2. Connect the OBD-II scanner: Locate your vehicle’s OBD-II port, which is typically located under the driver’s side dashboard. Plug in the OBD-II scanner and turn the ignition key to the “ON” position without starting the engine. The scanner should power up and establish a connection with your vehicle’s computer.
  3. Clear the code: Once the OBD-II scanner has connected to your vehicle’s computer, navigate to the option for clearing or erasing diagnostic trouble codes. This process can vary depending on the specific scanner you are using. Follow the on-screen prompts to erase the stored codes, including DTC C0246.
  4. Turn off the ignition and disconnect the scanner: After the codes have been cleared, turn off the ignition and unplug the OBD-II scanner from the port.
  5. Perform a test drive: Start your vehicle and take it for a test drive to ensure the issue has been resolved and the code does not reappear. If the DTC C0246 or any other related codes reappear during or after the test drive, further diagnosis and repair may be required.

✅Tools Need to Use

To diagnose and troubleshoot Toyota OBD DTC C0246, you will need the following tools:

  1. OBD-II Scanner: An OBD-II scanner is essential for reading and clearing diagnostic trouble codes, as well as viewing real-time data from the vehicle’s sensors. There are various types of scanners available, ranging from basic code readers to professional-grade diagnostic tools.
  2. Digital Multimeter (DMM): A digital multimeter is useful for checking voltages, resistances, and continuity in the ABS and EBD system’s wiring and components.
  3. Service Manual: A service manual for your specific Toyota make and model is invaluable for providing detailed information on component locations, wiring diagrams, diagnostic procedures, and repair steps.
  4. Basic Hand Tools: A set of basic hand tools, such as screwdrivers, pliers, and wrenches, may be necessary to access and remove components for inspection or replacement.
  5. Jack and Jack Stands or a Lift: If you need to inspect or replace wheel speed sensors, you may need a jack and jack stands or access to a vehicle lift to safely raise the vehicle off the ground.
  6. Torque Wrench: If you are removing and replacing any components, like the wheel speed sensors or ABS module, a torque wrench is necessary to ensure proper torque specifications are followed during reinstallation.

✅Step-by-Step Diagnostic Procedure

When diagnosing Toyota OBD DTC C0246, follow this step-by-step diagnostic procedure to identify and fix the issue:

  1. Read the trouble code: Connect an OBD-II scanner to your vehicle’s OBD-II port and read the stored diagnostic trouble codes. Make a note of any codes related to the ABS or EBD system, including C0246.
  2. Inspect wiring and connectors: Visually inspect the wiring and connectors related to the ABS and EBD system, focusing on the connections between the ABS control module, wheel speed sensors, and other components in the system. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components as necessary.
  3. Check wheel speed sensors: Inspect the wheel speed sensors for any signs of damage or corrosion. You can test the sensors with a digital multimeter to ensure they are functioning correctly. Consult your service manual for specific procedures and resistance values. Replace any faulty sensors as needed.
  4. Test the ABS control module: Consult your service manual for the procedure to test the ABS control module. This may involve using an OBD-II scanner with live data capabilities to monitor the module’s operation or performing a continuity test with a digital multimeter. If the module is found to be faulty, replace it as needed.
  5. Check fuses and relays: Inspect the fuses and relays related to the ABS and EBD systems in the fuse and relay box. Replace any blown fuses and test the relays for proper operation.
  6. Clear the codes and test drive: After addressing any issues found in the previous steps, use the OBD-II scanner to clear the stored trouble codes. Then, take the vehicle for a test drive to ensure the problem has been resolved and that no new codes appear.
  7. Seek professional assistance: If you are unable to identify or fix the issue yourself, consult a professional mechanic for further diagnosis and repair.

🔧Toyota C0246 OBD DTC Troubleshooting Guide: Affected Models

Diagnostic Trouble Code (DTC) C0246 is related to the Anti-lock Brake System (ABS) and Electronic Brakeforce Distribution (EBD) control system in Toyota vehicles. This code could potentially affect various Toyota models that support OBD-II.

Affected Toyota Vehicles

  • 🚗Toyota Yaris
  • 🚗Toyota Corolla
  • 🚗Toyota Camry
  • 🚗Toyota Avalon
  • 🚗Toyota Prius
  • 🚗Toyota 86
  • 🚗Toyota Supra
  • 🚗Toyota C-HR
  • 🚗Toyota RAV4
  • 🚗Toyota Venza
  • 🚗Toyota Highlander
  • 🚗Toyota 4Runner
  • 🚗Toyota Sequoia
  • 🚗Toyota Land Cruiser
  • 🚗Toyota Sienna
  • 🚗Toyota Tacoma
  • 🚗Toyota Tundra

Please note that the provided list of affected Toyota models may not cover all possible cases. The specific cause, location, and repair procedure can vary depending on the exact model, year, and configuration of your vehicle. Consult your vehicle’s service manual or contact your local Toyota dealer for more information on your specific make and model.

By familiarizing yourself with the potential causes, symptoms, and repair steps for DTC C0246, you can help keep your Toyota vehicle safe and reliable on the road. If you’re ever unsure about any part of the diagnosis or repair process, don’t hesitate to seek professional assistance.


I would like to conclude by emphasizing the importance of promptly addressing DTC C0246 in your Toyota vehicle. By following the troubleshooting guide provided, you can diagnose and repair the issue, ensuring the safety and reliability of your vehicle’s braking system. Remember, always refer to your vehicle’s service manual for specific information regarding your make and model and seek professional assistance if necessary.