Engine-Codes.com
Engine-Codes – Generic – B2722

B2722 Code - PASS-Key Detection Circuit

Quick Answer

The B2722 code indicates a fault in the PASS-Key detection circuit, which is a component of the vehicle's anti-theft system. Common causes include Faulty key transponder, Wiring issues in the PASS-Key detection circuit, Malfunctioning control module. 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
B2722 indicates PASS-Key Detection Circuit.
Common causes
Common causes include Faulty key transponder, Wiring issues in the PASS-Key detection circuit, Malfunctioning control module.
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 Aug 30, 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 B2722 Description

The B2722 code indicates a fault in the PASS-Key detection circuit, which is a component of the vehicle's anti-theft system. This system is designed to prevent unauthorized access to the vehicle by immobilizing the engine if the correct key is not detected. When this code is triggered, it means that there is a malfunction in the circuit that is responsible for detecting the key.

OBDII Code B2722 - PASS-Key Detection Circuit
B2722 Code - PASS-Key Detection Circuit

Common Causes of B2722

  1. Faulty key transponder
  2. Wiring issues in the PASS-Key detection circuit
  3. Malfunctioning control module
  4. Low battery power in the key fob
  5. Interference from other electronic devices

Symptoms of B2722

  1. Engine not starting
  2. Stalling while driving
  3. Intermittent starting issues
  4. Security light flashing on the dashboard
  5. Inability to turn the ignition key

How to Fix B2722

  1. Check the key fob battery and replace if necessary.
  2. Inspect the wiring in the PASS-Key detection circuit for any damage or loose connections.
  3. Test the key transponder for proper functionality.
  4. Scan the vehicle's computer system to reset the code and reprogram the anti-theft system.
  5. If needed, replace the control module to ensure proper detection of the key.

Cost to Fix B2722

The typical repair costs for addressing the B2722 code can range from $100 to $500, including parts and labor. However, actual costs can vary based on the specific diagnosis time and labor rates at auto repair shops, as well as the location, vehicle make and model, and engine type. It's advisable to consult with local auto repair shops for a more accurate estimate.

Need more information about the B2722 code?

Need more information on how to fix the B2722 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2722 code diagnosed by a professional: Find a repair shop in your area

Code B2722 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 B2722 Code

1. What does OBDII code B2722 mean?

Code B2722 indicates a problem in the PASS-Key detection circuit, which is part of the vehicle's anti-theft system.

2. What are the symptoms of a B2722 code?

Common symptoms include the engine failing to start, the security light staying illuminated, or intermittent starting issues.

3. What causes a B2722 code to appear?

This code can be caused by a faulty ignition key, a damaged ignition lock cylinder, a malfunctioning PASS-Key module, or wiring/connectivity issues in the detection circuit.

4. How can I diagnose a B2722 code?

Start by checking the ignition key for damage, inspecting the ignition lock cylinder, testing the PASS-Key module, and verifying the wiring connections for continuity and proper function.

5. Can a damaged ignition key trigger a B2722 code?

Yes, a damaged or worn ignition key that cannot be properly read by the PASS-Key system can trigger this code.

6. Is it safe to drive with a B2722 code?

No, driving may not be possible as this code often prevents the engine from starting due to the anti-theft system being triggered.

7. How do I fix a B2722 code?

Repairs may involve replacing the ignition key, repairing the ignition lock cylinder, replacing the PASS-Key module, or fixing damaged wiring in the detection circuit.

8. Can a weak battery cause a B2722 code?

While unlikely, a weak or failing battery can sometimes cause communication issues in the PASS-Key system, leading to this code.

9. Do I need to reprogram the key after fixing a B2722 code?

If a new key or module is installed, reprogramming the key to the vehicle's anti-theft system may be required. Consult your vehicle's service manual or a professional.

10. How much does it cost to fix a B2722 code?

The repair cost can vary, ranging from $50-$300 for a new key or cylinder replacement to $500 or more if the PASS-Key module needs replacement or extensive wiring repairs.

Discuss the causes and fixes for B2722 OBDII Code

Submit a New Comment

Code B2722 comments

No comments found for this page.