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Engine-Codes – Generic – C1380

C1380 Code - Stop Light Control Relay Malfunction

Quick Answer

The C1380 diagnostic trouble code refers to a Stop Light Control Relay Malfunction. Common causes include Faulty stop light control relay, Electrical wiring issues, Corrosion or damage to relay connections. 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
C1380 indicates Stop Light Control Relay Malfunction.
Common causes
Common causes include Faulty stop light control relay, Electrical wiring issues, Corrosion or damage to relay connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code C1380 Description

The C1380 diagnostic trouble code refers to a Stop Light Control Relay Malfunction. This code is typically associated with a malfunction in the relay responsible for controlling the vehicle's stop lights. The stop light control relay is a crucial component that plays a significant role in ensuring the proper functioning of the vehicle's stop lights. When this relay fails or malfunctions, it can lead to a variety of issues that can affect the vehicle's performance, safety, and overall driving experience.

OBDII Code C1380 - Stop Light Control Relay Malfunction
C1380 Code - Stop Light Control Relay Malfunction

Common Causes of C1380

  1. Faulty stop light control relay.
  2. Electrical wiring issues.
  3. Corrosion or damage to relay connections.
  4. Faulty brake light switch.
  5. Issues with the vehicle's computer system.

Symptoms of C1380

  1. Stop lights not illuminating when brakes are applied.
  2. Intermittent functioning of stop lights.
  3. Dashboard warning light indicating an issue with stop light control.
  4. Vehicle's brake lights staying on constantly.

How to Fix C1380

  1. Diagnose the issue by checking the stop light control relay, wiring, and connections for any signs of damage or malfunction.
  2. Replace the faulty stop light control relay with a new, compatible unit.
  3. Check and repair any damaged or corroded wiring or connections.
  4. Test the vehicle's stop lights to ensure they are functioning properly after the repair.
  5. Clear the diagnostic trouble code from the vehicle's computer system to reset the system and ensure the issue has been resolved.

Cost to Fix C1380

The typical repair costs for addressing a stop light control relay malfunction can vary depending on the extent of the issue and the specific components that need to be replaced. In general, the cost of a new stop light control relay can range from $50 to $150, depending on the make and model of the vehicle. Labor costs for this repair can range from $100 to $200, with total repair costs typically falling between $150 and $350.

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Code C1380 Information for Specific Makes

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 C1380 Code

1. What are the common symptoms of OBDII code C1380 (Stop Light Control Relay Malfunction)?

Common symptoms include non-functioning brake lights, illuminated brake warning light on the dashboard, and potential issues with the vehicle's cruise control system.

2. What are the possible causes of OBDII code C1380?

Possible causes of this code include a faulty stop light control relay, damaged wiring or connectors in the brake light circuit, or a malfunctioning brake light switch.

3. How can I diagnose the cause of OBDII code C1380?

To diagnose this code, you can start by checking the stop light control relay, inspecting the brake light circuit for any visible damage, and testing the brake light switch for proper functionality using a multimeter.

4. Can a malfunctioning stop light control relay affect vehicle safety?

Yes, a malfunctioning stop light control relay can affect vehicle safety by causing the brake lights to not illuminate properly, potentially leading to rear-end collisions due to other drivers not being able to see when you are braking.

5. Is it safe to drive with OBDII code C1380 present?

It is not recommended to drive with OBDII code C1380 present, as non-functioning brake lights can compromise your safety on the road. It is best to address the issue promptly.

6. How can I repair OBDII code C1380?

Repairing this code typically involves replacing the faulty stop light control relay, repairing any damaged wiring or connectors, and ensuring the brake light switch is functioning correctly.

7. Are there any DIY tips for fixing OBDII code C1380?

While some basic troubleshooting can be done at home, it is recommended to have a professional mechanic diagnose and repair OBDII code C1380 to ensure the issue is properly resolved.

8. Can a malfunctioning stop light control relay cause other OBDII codes to appear?

Yes, a malfunctioning stop light control relay can potentially trigger other related OBDII codes, such as codes related to the brake light circuit or cruise control system.

9. How much does it cost to repair OBDII code C1380?

The cost of repairing OBDII code C1380 can vary depending on the underlying cause of the issue, the cost of parts, and labor rates. It is advisable to get an estimate from a trusted mechanic.

10. Will resetting the OBDII system clear code C1380?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem.

Discuss the causes and fixes for C1380 OBDII Code

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