Lost Communication With Pedestrian Alert Module
The U0274 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Pedestrian Alert Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- EV pedestrian warning sound not playing
- Low-speed warning speaker silent
- AVAS system fault message
- Pedestrian alert indicator off
Probable Causes (Ranked by Likelihood)
- Failed pedestrian alert speaker Very High
- AVAS module failure High
- CAN bus wiring fault to speaker Moderate
- Software error in alert system Low
Step-by-Step Diagnostic Procedure
-
Check pedestrian alert speaker output
-
Scan AVAS module for codes
-
Test speaker with direct signal
-
Verify CAN bus at speaker module
Frequently Asked Questions
Can I drive with U0274?
Yes, but be extra cautious around pedestrians. They may not hear your vehicle approaching.
What causes U0274?
Usually a failed speaker or AVAS module. CAN bus wiring faults are less common.
Is the pedestrian alert required by law?
Yes, in many jurisdictions EVs and hybrids must emit sound at low speeds for pedestrian safety.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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