B2722 Buick Code - PASS-Key Detection Circuit
Quick Answer
The Body Control Module (BCM) supplies a 5 volt signal and a ground circuit for the PASS-Key® system. Common causes include Faulty Ignition Key, Faulty Ignition Lock Cylinder, Faulty Body Control Module (BCM). 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 Buick indicates PASS-Key Detection Circuit.
- Common causes
- Common causes include Faulty Ignition Key, Faulty Ignition Lock Cylinder, Faulty Body Control Module (BCM).
- 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.
Code B2722 Buick Description
What are the Possible Causes of the DTC B2722 Buick?
- Faulty Ignition Key
- Faulty Ignition Lock Cylinder
- Faulty Body Control Module (BCM)
How to Fix the DTC B2722 Buick?
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 B2722 Buick 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.
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Frequently Asked Questions about B2722 Buick Code
1. What does the OBDII code B2722 mean on a Buick?
The B2722 code indicates a fault in the PASS-Key detection circuit, which is part of the vehicle's anti-theft system.
2. What are common symptoms of the B2722 code in a Buick?
Symptoms may include the car not starting, the security light staying on or flashing, and intermittent starting issues.
3. What causes the B2722 PASS-Key Detection Circuit code to appear?
Common causes include a faulty ignition key resistor, worn key contacts, damaged wiring in the ignition lock cylinder, or a malfunctioning body control module (BCM).
4. Can I drive my Buick with a B2722 code?
It may be possible, but starting issues are likely. The anti-theft system could prevent the engine from starting altogether.
5. How do I diagnose a B2722 code on my Buick?
Diagnosis involves checking the key resistor value, inspecting the ignition lock cylinder wiring, and testing the body control module for faults.
6. Can a worn ignition key cause the B2722 code?
Yes, worn or damaged key contacts can lead to incorrect resistor values, triggering the code.
7. How do I fix the B2722 code on a Buick?
Repairs might include replacing the ignition key, repairing or replacing the ignition lock cylinder, or addressing damaged wiring in the PASS-Key system.
8. Does the B2722 code require programming after repairs?
If the body control module (BCM) or ignition components are replaced, reprogramming or relearning the system may be necessary.
9. How much does it cost to fix the B2722 code on a Buick?
Costs vary depending on the repair. A new key and reprogramming might cost $100–$200, while replacing the ignition lock cylinder or BCM could cost significantly more.
10. Can a dead battery cause the B2722 code?
A dead or weak battery typically won't cause this code but could contribute to electrical issues that complicate diagnosis.
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