AutoCodes – Lexus – C1311 Lexus

C1311 Lexus Code - Open In Main Relay 1 Circuit

Quick Answer

The Anti-Lock Brake System (ABS) main relay 1 (ABS No.1 relay) supplies power to the changeover solenoid and the linear solenoid. Common causes include Faulty Anti-Lock Brake System (ABS) Main Relay 1, ABS Main Relay 1 harness is open or shorted, ABS Main Relay 1 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C1311 Lexus indicates Open In Main Relay 1 Circuit.
Common causes: Common causes include Faulty Anti-Lock Brake System (ABS) Main Relay 1, ABS Main Relay 1 harness is open or shorted, ABS Main Relay 1 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,965

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1311 Lexus Description

The Anti-Lock Brake System (ABS) main relay 1 (ABS No.1 relay) supplies power to the changeover solenoid and the linear solenoid. ABS main relay 2 (ABS No.2 relay) goes on for approximately 5 seconds after the ignition switch is turned off and the braking effort signal input is terminated. ABS main relay 2 (ABS No.2 relay) supplies electricity and maintains operating condition for the brake system when the ignition switch is off.

OBDII Code C1311 Lexus - Open In Main Relay 1 Circuit - AutoCodes.com — C1311 Lexus Code - Open In Main Relay 1 Circuit

What does this mean?

What are the Possible Causes of the DTC C1311 Lexus?

Faulty Anti-Lock Brake System (ABS) Main Relay 1
ABS Main Relay 1 harness is open or shorted
ABS Main Relay 1 circuit poor electrical connection

How to Fix the DTC C1311 Lexus?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1311 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1311 Lexus code?

Need more information on how to fix the C1311 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1311 Lexus code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1311 Lexus Code

1. What are the common symptoms of OBDII code C1311 "Open In Main Relay 1 Circuit" in a Lexus?

- Common symptoms include difficulty starting the vehicle, engine stalling, and the engine not running smoothly.

2. What can cause the OBDII code C1311 to trigger in a Lexus?

- The code C1311 can be triggered by a damaged main relay, a loose connection in the main relay circuit, or a faulty wiring harness.

3. How can I diagnose the issue related to the OBDII code C1311 in my Lexus?

- To diagnose the problem, you can perform a visual inspection of the main relay and its connections, test the relay for continuity, and check the wiring harness for any damage.

4. Is it safe to continue driving my Lexus with the OBDII code C1311 present?

- It is not recommended to continue driving the vehicle with the code C1311 present, as it can lead to potential stalling or starting issues that may affect the safety of the vehicle.

5. Can I repair the OBDII code C1311 issue in my Lexus on my own?

- Depending on your skill level and experience with automotive repairs, you may be able to repair the issue related to the code C1311 on your own by replacing the main relay or repairing any damaged wiring.

6. Will resetting the OBDII code C1311 in my Lexus make the issue go away?

- Resetting the code may temporarily clear the check engine light, but it will not fix the underlying issue causing the code to trigger. It is important to diagnose and repair the problem to prevent future issues.

7. How much does it typically cost to repair the OBDII code C1311 in a Lexus?

- The cost of repairing the code C1311 can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can a faulty battery or alternator cause the OBDII code C1311 to appear in a Lexus?

- While a faulty battery or alternator can cause electrical issues in a vehicle, they are not common causes of the code C1311. It is best to focus on diagnosing the main relay and wiring first.

9. Are there any preventive measures I can take to avoid the OBDII code C1311 in my Lexus?

- To prevent the code C1311 from appearing, you can perform regular maintenance checks on the main relay and wiring harness to ensure they are in good condition.

10. How long does it typically take to repair the OBDII code C1311 issue in a Lexus?

- The repair time for the code C1311 can vary depending on the extent of the damage and the availability of parts, but it may take a few hours to a full day to diagnose and fix the issue.