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Engine-Codes – Generic – B2479

B2479 Code - Brake Park Switch Circuit Short To Ground

Quick Answer

The B2479 diagnostic trouble code (DTC) indicates that there is a short to ground in the brake park switch circuit. Common causes include Damaged wiring or connectors in the brake park switch circuit, Faulty brake park switch, Corrosion or moisture in the electrical 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
B2479 indicates Brake Park Switch Circuit Short To Ground.
Common causes
Common causes include Damaged wiring or connectors in the brake park switch circuit, Faulty brake park switch, Corrosion or moisture in the electrical 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 08, 2024
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Code B2479 Description

The B2479 diagnostic trouble code (DTC) indicates that there is a short to ground in the brake park switch circuit. The brake park switch is a component that signals the vehicle's electronic control unit (ECU) when the brake pedal is pressed. This information is crucial for various safety and operational systems within the vehicle, such as the brake lights, cruise control, and transmission shift interlock.

OBDII Code B2479 - Brake Park Switch Circuit Short To Ground
B2479 Code - Brake Park Switch Circuit Short To Ground

Common Causes of B2479

  1. Damaged wiring or connectors in the brake park switch circuit
  2. Faulty brake park switch
  3. Corrosion or moisture in the electrical connections
  4. Short circuit caused by a damaged component in the circuit
  5. Electrical issues in the ECU

Symptoms of B2479

  1. Malfunctioning brake lights
  2. Inability to shift out of park
  3. Cruise control not working
  4. Illuminated brake warning light on the dashboard

How to Fix B2479

  1. Begin by inspecting the wiring and connectors in the brake park switch circuit for any damage or corrosion. Repair or replace any affected components as necessary.
  2. Test the brake park switch for proper operation using a multimeter. Replace the switch if it is found to be faulty.
  3. Check for any shorts in the circuit by performing a continuity test. Repair or replace any shorted components.
  4. Clear the DTC from the ECU's memory using a diagnostic scan tool.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the symptoms associated with the B2479 code have been eliminated.

Cost to Fix B2479

The typical repair cost for addressing a B2479 DTC can vary depending on the extent of the issue and the specific components that need to be replaced. In general, the cost of parts for a brake park switch circuit repair can range from $50 to $200, while labor costs can add an additional $100 to $300 to the total bill. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to contact a local shop for a more accurate estimate.

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Code B2479 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 B2479 Code

1. What are the common symptoms of OBDII code B2479 (Brake Park Switch Circuit Short To Ground)?

- Common symptoms include the brake lights staying on constantly, the inability to shift out of park, and potential issues with the vehicle's cruise control system.

2. What are the possible causes of OBDII code B2479?

- The code B2479 can be caused by a short to ground in the brake park switch circuit, a faulty brake park switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B2479?

- To diagnose the cause of code B2479, you can conduct a visual inspection of the brake park switch and its wiring, perform a circuit test using a multimeter, and use a scan tool to check for related trouble codes.

4. How do I repair a Brake Park Switch Circuit Short To Ground issue?

- Repairing a Brake Park Switch Circuit Short To Ground issue may involve replacing the faulty brake park switch, repairing damaged wiring or connectors, or reprogramming the control module if needed.

5. Can I continue driving with OBDII code B2479 present?

- It is not recommended to continue driving with OBDII code B2479 present, as it can affect the proper operation of the brake lights and potentially lead to safety hazards on the road.

6. Will resetting the trouble codes make OBDII code B2479 disappear?

- Resetting the trouble codes may temporarily clear OBDII code B2479, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

7. Is it possible to fix OBDII code B2479 on my own, or should I seek professional help?

- While some DIY enthusiasts may be able to address OBDII code B2479 on their own by following repair guides and using appropriate tools, seeking professional help from a certified mechanic is recommended for accurate diagnosis and repair.

8. How much does it typically cost to repair OBDII code B2479?

- The cost to repair OBDII code B2479 can vary depending on the underlying cause, the parts needed for the repair, and the labor rates of the repair facility. It is advisable to obtain quotes from different mechanics or repair shops.

9. Can extreme weather conditions or rough driving affect the occurrence of OBDII code B2479?

- Extreme weather conditions or rough driving may not directly cause OBDII code B2479, but they can potentially worsen existing issues with the brake park switch circuit or related components, leading to the appearance of the trouble code.

10. How often should I check the brake park switch circuit to prevent OBDII code B2479 from occurring?

- It is recommended to include a visual inspection of the brake park switch circuit as part of regular vehicle maintenance checks to detect any early signs of wear, damage, or potential issues that could trigger OBDII code B2479.

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