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Engine-Codes – Generic – B27A6

B27A6 Code - Open In Rear Floor Electrical Key Oscillator Circuit

Quick Answer

The B27A6 code indicates an open circuit in the rear floor electrical key oscillator circuit. Common causes include Damaged wiring in the rear floor electrical key oscillator circuit, Faulty key fob, Corrosion in the key fob receiver. 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
B27A6 indicates Open In Rear Floor Electrical Key Oscillator Circuit.
Common causes
Common causes include Damaged wiring in the rear floor electrical key oscillator circuit, Faulty key fob, Corrosion in the key fob receiver.
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 06, 2024
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Code B27A6 Description

The B27A6 code indicates an open circuit in the rear floor electrical key oscillator circuit. This circuit is responsible for transmitting signals between the key fob and the vehicle's immobilizer system, allowing the vehicle to start when the correct key is detected. When there is an open circuit, communication between the key fob and the immobilizer system is disrupted, which can prevent the vehicle from starting or cause intermittent starting issues. This can lead to inconvenience and potential security concerns.

OBDII Code B27A6 - Open In Rear Floor Electrical Key Oscillator Circuit
B27A6 Code - Open In Rear Floor Electrical Key Oscillator Circuit

Common Causes of B27A6

  1. Damaged wiring in the rear floor electrical key oscillator circuit
  2. Faulty key fob
  3. Corrosion in the key fob receiver
  4. Issues with the immobilizer system
  5. Faulty key fob battery

Symptoms of B27A6

  1. Vehicle not starting
  2. Intermittent starting issues
  3. Key fob not working properly
  4. Security system malfunctions
  5. Warning light on the dashboard

How to Fix B27A6

  1. Diagnose the issue by inspecting the wiring and key fob components.
  2. Repair or replace any damaged wiring in the rear floor electrical key oscillator circuit.
  3. Test the key fob and replace if necessary.
  4. Clean or replace the key fob receiver if there is corrosion.
  5. Reset the immobilizer system and reprogram the key fob.

Cost to Fix B27A6

The cost of repairing an open circuit in the rear floor electrical key oscillator circuit can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair cost for this issue can range from $100 to $300, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on individual circumstances. Additionally, diagnostic time and labor rates at auto repair shops can impact the overall cost. It's recommended to obtain a detailed quote from a reputable mechanic to determine the exact cost for your specific vehicle.

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Code B27A6 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 B27A6 Code

What does OBDII code B27A6 mean?

Code B27A6 indicates an open circuit in the rear floor electrical key oscillator, which is part of the vehicle's keyless entry and start system.

What are the common symptoms of code B27A6?

Common symptoms include the key fob not being detected in the vehicle, difficulty starting the car, or keyless entry features not functioning properly.

What causes the B27A6 code to appear?

The code can be caused by a damaged or disconnected rear floor electrical key oscillator, faulty wiring or connectors, or a failed oscillator module.

How do I diagnose the B27A6 code?

Diagnosis involves checking the rear floor oscillator for damage, inspecting the wiring and connectors for continuity, and testing the oscillator module for proper function.

Can a dead key fob battery cause code B27A6?

No, a dead key fob battery typically causes different issues. Code B27A6 is related to the electrical circuit of the rear floor oscillator, not the key fob itself.

Is it safe to drive with the B27A6 code?

While the vehicle may still be drivable, the keyless entry and start system may malfunction, potentially leaving you unable to start the car in some situations.

How do I fix code B27A6?

Repairs may include replacing the rear floor electrical key oscillator, repairing damaged wiring or connectors, or reprogramming the system if necessary.

Can I clear the B27A6 code without repairs?

Clearing the code without addressing the underlying issue may cause it to reappear. Proper diagnosis and repair are recommended.

How much does it cost to fix code B27A6?

Repair costs vary depending on whether you need to replace the oscillator, repair wiring, or address other related issues. Expect costs to range from $100 to $400 or more.

Can a software update fix the B27A6 code?

In some cases, a software update may resolve communication issues in the system, but physical damage to the oscillator or wiring will require repairs.

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