B0123 — Pedestrian Alert Speaker B

What Does B0123 Mean?

B0123 is a diagnostic trouble code indicating: Pedestrian Alert Speaker B. This code relates to the body electrical system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of B0123

⚠️ Check Engine Light (MIL) illuminated
⚠️ Pedestrian Alert Speaker B not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Interior or exterior lighting malfunction

Common Causes

🔍 Faulty Pedestrian Alert Speaker B
🔍 Wiring or connector issue in Pedestrian Alert Speaker B circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does B0123 mean?

B0123 indicates: Pedestrian Alert Speaker B. The vehicle's computer has detected that the Pedestrian Alert Speaker B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code B0123?

Yes, B0123 is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix B0123?

Repair costs for B0123 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Pedestrian Alert Speaker B and related wiring
🔧 Replace faulty Pedestrian Alert Speaker B

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

B0123: Pedestrian Alert Speaker B