AutoCodes – Generic – C1249

C1249 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 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 24,114

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

What does this mean?

What are the Possible Causes of the DTC C1249?

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?

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 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 code?

Need more information on how to fix the C1249 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1249 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1249 Lexus — Open in Stop Light Switch Circuit
C1249 Scion — Open in Stop Light Switch Circuit
C1249 Toyota — Open in Stop Light Switch Circuit

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 Code

1. What are the common symptoms of OBDII code C1249 (Open in Stop Light Switch Circuit)?

- Common symptoms include the brake lights staying on, inability to shift out of park, and the cruise control not working.

2. What causes the OBDII code C1249 to be triggered?

- The code is typically triggered by a faulty stop light switch, damaged wiring, or a poor connection in the stop light switch circuit.

3. How can I diagnose the issue causing OBDII code C1249?

- You can diagnose the issue by checking the stop light switch for proper operation, inspecting the wiring for any damage, and testing for continuity in the stop light switch circuit.

4. Can a bad stop light switch cause other issues in the vehicle?

- Yes, a malfunctioning stop light switch can lead to safety concerns by affecting brake light functionality and causing problems with shifting and cruise control.

5. What are some repair tips for fixing OBDII code C1249?

- Repair tips include replacing the faulty stop light switch, repairing damaged wiring, and ensuring all connections are secure and free of corrosion.

6. Is it safe to continue driving with OBDII code C1249 present?

- It is not recommended to drive with this code present, as it can affect the proper functioning of crucial safety features like brake lights and cruise control.

7. Can I reset the OBDII code C1249 without addressing the underlying issue?

- Resetting the code without addressing the underlying issue will likely result in the code returning once the problem persists, so it is best to diagnose and repair the root cause.

8. How much does it typically cost to repair OBDII code C1249?

- The cost of repair can vary depending on the exact cause of the issue, but replacing a faulty stop light switch or repairing wiring may range from $50 to $200.

9. Are there any DIY fixes for OBDII code C1249?

- DIY fixes may include replacing the stop light switch or repairing damaged wiring if you have the necessary tools and knowledge, but it's recommended to consult a professional if unsure.

10. Can a mechanic easily diagnose and fix OBDII code C1249?

- Yes, a qualified mechanic can quickly diagnose the issue using diagnostic tools and repair the problem by replacing the faulty components or repairing the wiring as needed.