AutoCodes – Lexus – C1249 Lexus

C1249 Lexus Code - Open in Stop Light Switch Circuit

Quick Answer

The skid control ECU detects the brake operating conditions through a signal transmitted by the stop light switch. Common causes include Faulty Stop Light Switch, Stop Light Switch harness is open or shorted, Stop Light Switch 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: C1249 Lexus indicates Open in Stop Light Switch Circuit.
Common causes: Common causes include Faulty Stop Light Switch, Stop Light Switch harness is open or shorted, Stop Light Switch 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.

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Code Popularity 27,704

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 Aug 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1249 Lexus Description

The skid control ECU detects the brake operating conditions through a signal transmitted by the stop light switch. The skid control ECU incorporates an open circuit detection circuit. This DTC is set under either of the following conditions:
- An open is detected in the stop light signal input line when the stop light switch is off.
- An open is detected in the stop light circuit lead to the ground when the stop light switch is off.

OBDII Code C1249 Lexus - Open in Stop Light Switch Circuit - AutoCodes.com — C1249 Lexus Code - Open in Stop Light Switch Circuit

What does this mean?

What are the Possible Causes of the DTC C1249 Lexus?

Faulty Stop Light Switch
Stop Light Switch harness is open or shorted
Stop Light Switch circuit poor electrical connection
Faulty ABS and Traction Actuator

How to Fix the DTC C1249 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 C1249 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 C1249 Lexus code?

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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 C1249 Lexus Code

1. What is OBDII code C1249 in a Lexus?

- OBDII code C1249 in a Lexus indicates an open in the stop light switch circuit.

2. What are the common symptoms of OBDII code C1249 in a Lexus?

- Common symptoms include the brake lights not working, the vehicle not shifting out of park, and the "Check Engine" light being illuminated.

3. What are the possible causes of OBDII code C1249 in a Lexus?

- The possible causes can include a faulty stop light switch, damaged wiring or connectors in the circuit, or a problem with the brake pedal position sensor.

4. How can I diagnose the issue causing OBDII code C1249 in my Lexus?

- You can start by checking the stop light switch for proper operation, inspecting the wiring and connectors for any damage, and testing the brake pedal position sensor using a multimeter.

5. Can I still drive my Lexus with OBDII code C1249 present?

- It is not recommended to drive the vehicle with this issue, as it can affect the brake lights and potentially lead to unsafe driving conditions.

6. How do I repair OBDII code C1249 in a Lexus?

- The repair typically involves replacing the faulty stop light switch, repairing any damaged wiring or connectors, or addressing any issues with the brake pedal position sensor.

7. Is it possible to reset OBDII code C1249 in a Lexus without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is essential to address the root cause to prevent the code from reappearing and ensure the proper functioning of the brake system.

8. Can a DIY enthusiast fix OBDII code C1249 in a Lexus?

- Depending on your experience and tools available, you may be able to replace the stop light switch or inspect the wiring yourself. However, complex issues may require professional assistance.

9. How long does it take to repair OBDII code C1249 in a Lexus?

- The repair time can vary based on the exact cause of the issue and your experience level. It can range from a few minutes for a simple switch replacement to a few hours for more complex wiring repairs.

10. Is OBDII code C1249 specific to Lexus vehicles only?

- While the specific code C1249 may vary between manufacturers, similar issues related to the stop light switch circuit can occur in other vehicle brands as well.