AutoCodes – Scion – B27A8 Scion

B27A8 Scion Code - Open In Outside Luggage Compartment Electrical Key Antenna Circuit

Quick Answer

The Certification ECU (Smart Key ECU Assembly) generates a request signal and sends it to the Outside Electrical Key Oscillator (for rear side). Common causes include Faulty Outside Electrical Key Oscillator (for rear side), Outside Electrical Key Oscillator harness is open or shorted, Outside Electrical Key Oscillator 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
B27A8 Scion indicates Open In Outside Luggage Compartment Electrical Key Antenna Circuit.
Common causes
Common causes include Faulty Outside Electrical Key Oscillator (for rear side), Outside Electrical Key Oscillator harness is open or shorted, Outside Electrical Key Oscillator 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 784
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 18, 2023
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Code B27A8 Scion Description

The Certification ECU (Smart Key ECU Assembly) generates a request signal and sends it to the Outside Electrical Key Oscillator (for rear side). To detect the key near the driver door, the Outside Electrical Key Oscillator (for rear side) creates a detection area towards the area approximately 1.0 m (3.28 ft.) from the back door.
The Diagnostic Trouble Code (DTC) B27A8 is detected by the Certification ECU (Smart Key ECU Assembly) when an open circuit occurs between the Certification ECU (Smart Key ECU Assembly) and Outside Electrical Key Oscillator (for rear side) terminals.
OBDII Code B27A8 Scion - Open In Outside Luggage Compartment Electrical Key Antenna Circuit - AutoCodes.com
B27A8 Scion Code - Open In Outside Luggage Compartment Electrical Key Antenna Circuit

What are the Possible Causes of the DTC B27A8 Scion?

  • Faulty Outside Electrical Key Oscillator (for rear side)
  • Outside Electrical Key Oscillator harness is open or shorted
  • Outside Electrical Key Oscillator circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B27A8 Scion?

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 B27A8 Scion 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 B27A8 Scion code?

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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 B27A8 Scion Code

1. What are common symptoms of OBDII code B27A8 in a Scion related to an open in the outside luggage compartment electrical key antenna circuit?

- Common symptoms include issues with the keyless entry system, difficulty locking and unlocking the vehicle, and intermittent functioning of the key fob.

2. What are the possible causes of OBDII code B27A8 in a Scion indicating an open in the outside luggage compartment electrical key antenna circuit?

- The code can be triggered by damaged wiring in the key antenna circuit, a faulty key antenna module, or a poor connection in the circuit.

3. How can I diagnose the problem with OBDII code B27A8 in my Scion associated with an open in the outside luggage compartment electrical key antenna circuit?

- To diagnose the issue, you can perform a visual inspection of the wiring, check for loose connections, use a multimeter to test continuity, and scan for any other related trouble codes.

4. Are there any repair tips for fixing OBDII code B27A8 in a Scion due to an open in the outside luggage compartment electrical key antenna circuit?

- Repair tips may include repairing or replacing damaged wiring, ensuring proper connection of the key antenna module, and resetting the system after making repairs.

5. Can I drive my Scion with OBDII code B27A8 related to an open in the outside luggage compartment electrical key antenna circuit?

- While the vehicle may still be operable with this code, it is recommended to address the issue promptly to avoid potential inconvenience or security concerns.

6. How can I prevent OBDII code B27A8 from recurring in my Scion after repairing an open in the outside luggage compartment electrical key antenna circuit?

- To prevent code B27A8 from coming back, ensure all repairs are done correctly, use high-quality replacement parts if needed, and regularly inspect the key antenna circuit for any signs of wear or damage.

7. Is it possible to reset OBDII code B27A8 in a Scion without fixing the open in the outside luggage compartment electrical key antenna circuit?

- Simply resetting the code without addressing the underlying issue will likely result in the code reappearing once the system detects the problem again.

8. How long does it typically take to repair OBDII code B27A8 caused by an open in the outside luggage compartment electrical key antenna circuit in a Scion?

- The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed, but it may take anywhere from a few hours to a full day in some cases.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B27A8 related to an open in the outside luggage compartment electrical key antenna circuit in a Scion?

- Depending on the specific skill level and tools available, some DIY enthusiasts may be able to diagnose and repair this issue themselves, but it's recommended to consult a professional if unsure.

10. Will fixing OBDII code B27A8 associated with an open in the outside luggage compartment electrical key antenna circuit affect the overall performance of my Scion?

- Resolving this code should restore proper functioning of the keyless entry system, improving convenience and security features of your Scion.

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