AutoCodes – Generic – B2479

B2479 Code - Brake Park Switch Circuit Short To Ground

Quick Answer

The Instrument Cluster (IC) uses 3 basic messaged inputs to control the brake warning indicator. Common causes include Faulty Brake Park Switch, Brake Park Switch harness is open or shorted, Brake Park 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: B2479 indicates Brake Park Switch Circuit Short To Ground.
Common causes: Common causes include Faulty Brake Park Switch, Brake Park Switch harness is open or shorted, Brake Park 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 28,688

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 Dec 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2479 Description

The Instrument Cluster (IC) uses 3 basic messaged inputs to control the brake warning indicator. The first 2 are the parking brake warning indicator switch and brake fluid level switch. The third is for the Electronic Brake Distribution (EBD), controlled by the ABS. The parking brake warning indicator switch and the brake fluid level switch status are sent from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) communication bus. The EBD message is sent from the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus lines.

OBDII Code B2479 - Brake Park Switch Circuit Short To Ground - AutoCodes.com — B2479 Code - Brake Park Switch Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B2479?

Faulty Brake Park Switch
Brake Park Switch harness is open or shorted
Brake Park Switch circuit poor electrical connection

How to Fix the DTC B2479?

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 B2479 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 B2479 code?

Need more information on how to fix the B2479 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2479 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2479 Ford — Brake Park Switch Circuit Short To Ground
B2479 Lincoln — Brake Park Switch Circuit Short To Ground
B2479 Mercury — Brake Park Switch Circuit Short To Ground

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.