Skip to content
Book on WhatsApp

B0122

Pedestrian Alert Speaker A

Fault on pedestrian alert speaker A — emits an artificial driving sound at low speed on EVs/hybrids (legally required, e.g. UNECE R138, FMVSS 141).

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: medium

Symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Common causes

Ordered by how often each turns out to be the cause.

  • Speaker coil openCommon

Parts involved

  • Pedestrian Alert Speaker A
  • Speaker Wiring

B0122 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.