Engine-Codes.com
Engine-Codes – Scion – B2799 Scion

B2799 Scion Code - Engine Immobiliser System Malfunction

Quick Answer

The B2799 Scion code indicates a malfunction in the engine immobilizer system. Common causes include Faulty immobilizer key or key fob, Malfunctioning antenna coil, Defective immobilizer ECU. 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
B2799 Scion indicates Engine Immobiliser System Malfunction.
Common causes
Common causes include Faulty immobilizer key or key fob, Malfunctioning antenna coil, Defective immobilizer ECU.
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 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B2799 Scion Description

The B2799 Scion code indicates a malfunction in the engine immobilizer system. The engine immobilizer system is a security feature that prevents the engine from starting without the correct key or key fob. When this system malfunctions, it can prevent the engine from starting altogether, leaving the vehicle inoperable.

OBDII Code B2799 Scion - Engine Immobiliser System Malfunction
B2799 Scion Code - Engine Immobiliser System Malfunction

Common Causes of B2799 Scion

  1. Faulty immobilizer key or key fob.
  2. Malfunctioning antenna coil.
  3. Defective immobilizer ECU.
  4. Wiring issues in the engine immobilizer system.
  5. Programming errors in the system.

Symptoms of B2799 Scion

  1. The engine cranks but does not start.
  2. The engine starts and then immediately shuts off.
  3. The security light on the dashboard remains illuminated.
  4. The key or key fob is not recognized by the system.

How to Fix B2799 Scion

  1. Check the immobilizer key and key fob for damage or malfunctions. Replace if necessary.
  2. Inspect the antenna coil for any signs of damage or corrosion. Replace if needed.
  3. Test the immobilizer ECU for faults and replace if it is found to be defective.
  4. Check the wiring in the engine immobilizer system for any shorts or breaks. Repair as needed.
  5. Verify that the programming of the system is correct and reprogram if necessary.

Cost to Fix B2799 Scion

The cost of repairing a B2799 Scion code can vary depending on the specific cause of the issue. In general, replacing a faulty immobilizer key or key fob can cost anywhere from $50 to $200. Replacing an antenna coil or immobilizer ECU can range from $100 to $500 or more. Wiring repairs and reprogramming the system may also incur additional costs.

Need more information about the B2799 Scion code?

Need more information on how to fix the B2799 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2799 Scion code diagnosed by a professional: Find a repair shop in your area

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 B2799 Scion Code

What does the OBDII code B2799 mean in a Scion?

Code B2799 indicates a malfunction in the engine immobilizer system, which prevents the engine from starting if the correct key is not detected.

What are common symptoms of code B2799 in a Scion?

Symptoms include the engine failing to start, security warning lights on the dashboard, and potential intermittent starting issues.

What causes code B2799 in a Scion?

Common causes include a faulty transponder key, a damaged immobilizer system antenna, wiring issues, or problems with the engine control module (ECM).

Can a weak car battery trigger code B2799?

Yes, a weak or failing battery can disrupt the immobilizer system’s operation, potentially leading to this code.

How do I fix code B2799 in a Scion?

Repairs may involve reprogramming or replacing the key, inspecting and repairing wiring, replacing the immobilizer antenna, or addressing ECM issues.

Can I clear code B2799 without fixing the issue?

Clearing the code without addressing the underlying problem may temporarily erase it, but the issue will likely return until the malfunction is resolved.

Will code B2799 prevent my Scion from starting?

Yes, this code can prevent the engine from starting due to immobilizer system failure.

How much does it cost to repair code B2799 in a Scion?

Repair costs vary depending on the issue but can range from $150 for reprogramming a key to over $500 for replacing immobilizer components.

Can code B2799 be caused by a faulty key fob?

Yes, a malfunctioning or improperly programmed key fob can trigger this code and prevent the immobilizer system from functioning correctly.

Do I need a professional to fix code B2799?

While some issues like reprogramming a key may require professional tools, diagnosing and repairing wiring or ECM problems typically requires a qualified technician.

Discuss the causes and fixes for B2799 Scion OBDII Code

Submit a New Comment

Code B2799 Scion comments

No comments found for this page.