Network, generic

U013F Lost Communication With Pedestrian Alert Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U013F reports that the pedestrian alert control module has gone silent. Electric and hybrid cars need it to produce a warning sound at low speed, because they are otherwise almost inaudible; FMVSS 141 in the US and UN R138 in Europe make such a sound mandatory. GM describes the system on the 2022 BrightDrop EV600: the module creates a tone whose pitch and volume follow the vehicle's speed, plays it through one front and one rear speaker below 30 km/h whenever a driving gear, forward or reverse, is engaged, and is driven by the BCM over LIN. No manufacturer explains U013F itself in public. Circuit faults of the module appear as P0DED to P0DEF. The car drives normally, but pedestrians may not hear it, so the fault deserves a prompt repair.

Likely causes

Water or corrosion at the module, a speaker or their connectors
Supply, ground or LIN/CAN wiring of the module faulty
Pedestrian alert control module internally faulty

Symptoms

  • No warning sound when driving slowly
  • Pedestrian alert fault message in the cluster

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–700
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pedestrian alert modulecan bus wiring

Related codes

P0DEDP0DEEP0DEFU0140

References: static.nhtsa.gov, en.wikipedia.org, law.cornell.edu.