AutoCodes – Generic – B1484

B1484 Code - Brake Pedal Input Open Circuit

Quick Answer

Fused battery voltage is supplied to the Brake Pedal Position (BPP) Switch from Smart Junction Box (SJB) fuse along the circuit. Common causes include Faulty Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted, Brake Pedal Position 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: B1484 indicates Brake Pedal Input Open Circuit.
Common causes: Common causes include Faulty Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted, Brake Pedal Position 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 31,303

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 Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1484 Description

Fused battery voltage is supplied to the Brake Pedal Position (BPP) Switch from Smart Junction Box (SJB) fuse along the circuit. When the brake pedal is pressed, the BPP switch supplies fused battery voltage to the Anti-Lock Brake System (ABS) module, the Powertrain Control Module (PCM) and the SJB along the circuit.

OBDII Code B1484 - Brake Pedal Input Open Circuit - AutoCodes.com — B1484 Code - Brake Pedal Input Open Circuit

What does this mean?

What are the Possible Causes of the DTC B1484?

Faulty Brake Pedal Position Switch
Brake Pedal Position Switch harness is open or shorted
Brake Pedal Position Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1484?

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 B1484 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 B1484 code?

Need more information on how to fix the B1484 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1484 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1484 Ford — Brake Pedal Input Open Circuit
B1484 Hyundai — 2nd Stage Driver Airbag Resistance Circuit Short To Battery
B1484 KIA — 2nd Stage Driver Airbag Resistance Circuit Short To Battery
B1484 Lincoln — Brake Pedal Input Open Circuit
B1484 Mercury — Brake Pedal Input Open 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 B1484 Code

1. What are common symptoms of OBDII code B1484 (Brake Pedal Input Open Circuit)?

- Common symptoms include the brake lights staying on constantly, the cruise control being disabled, and the inability to shift out of park.

2. What are some possible causes of OBDII code B1484?

- Potential causes include a faulty brake pedal switch, damaged wiring or connectors in the brake pedal circuit, or a malfunctioning body control module.

3. How can I diagnose the cause of OBDII code B1484?

- You can start by checking the brake pedal switch for proper operation, inspecting the wiring and connectors for any signs of damage, and using a diagnostic tool to scan for fault codes and monitor brake pedal input data.

4. Is it safe to drive with OBDII code B1484 present?

- It is not recommended to drive with this code active, as it can affect the proper operation of your brake lights and other important safety systems.

5. Can I repair OBDII code B1484 myself?

- Depending on your level of automotive repair experience, you may be able to address this issue yourself by replacing a faulty brake pedal switch or repairing damaged wiring. However, professional assistance may be necessary for more complex repairs.

6. Are there any quick temporary fixes for OBDII code B1484?

- While temporary fixes are not recommended, you may try resetting the fault code using an OBDII scanner to see if it reoccurs after driving. However, it's important to address the underlying issue to prevent further problems.

7. How much does it typically cost to repair OBDII code B1484?

- The cost of repairing this code can vary depending on the cause of the issue and whether you choose to do the repairs yourself or seek professional help. Costs may include parts, labor, and diagnostic fees.

8. Can OBDII code B1484 cause other problems with my vehicle?

- Yes, unresolved issues related to this code can lead to safety concerns, such as brake light failures, which may result in rear-end collisions or other accidents.

9. Will OBDII code B1484 cause my vehicle to fail an emissions test?

- This code is not directly related to emissions, so it may not cause your vehicle to fail an emissions test. However, it's still important to address the issue for proper vehicle operation.

10. How long does it typically take to repair OBDII code B1484?

- The repair time can vary depending on the specific cause of the issue and the complexity of the repair. Simple fixes like replacing a brake pedal switch may take less than an hour, while more extensive wiring repairs could take longer.