AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Toyota - C0278 Toyota

C0278 Toyota Code - Open or Short Circuit in ABS Solenoid Relay Circuit

- Code Popularity: 99,555 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC C0278 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Blown Anti-Lock Brake System (ABS) Solenoid Relay Fuse
  • Faulty ABS Solenoid Relay
  • ABS Solenoid Relay harness is open or shorted
  • ABS Solenoid Relay circuit poor electrical connection
  • ABS Actuator (Skid Control ECU)
⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC C0278 Toyota?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for C0278 Toyota Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0278 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C0278 Toyota Description

The solenoid relay supplies power to the Anti-Lock Brake System (ABS) solenoid and TRAC solenoid.
After the ignition switch is turned on, the vehicle speed has reached 4 mph (6 km/h) and the solenoid is determined to be normal by the initial check self- diagnosis, the relay switches on. If any open or short circuits are detected, the relay switches off.
These DTCs may be set if the voltage supply to the solenoid relay (+BS) falls below the DTC detection threshold due to the battery or generator outputs being insufficient.

OBDII Code C0278 Toyota - Open or Short Circuit in ABS Solenoid Relay Circuit - AutoCodes.com
C0278 Toyota Code - Open or Short Circuit in ABS Solenoid Relay Circuit

Need More Information on the Code?

Need more information on how to fix the C0278 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0278 Toyota code diagnosed by a professional: Find a repair shop in your area

Code C0278 Toyota comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the C0278 Toyota code? Have you replaced any parts?
Any information is appreciated. Thanks