U013F code meaning
Lost Communication With Pedestrian Alert Control Module
What U013F means
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.
U013F at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U013F
- No warning sound when driving slowly
- Pedestrian alert fault message in the cluster
Common causes of U013F
- Most likelyWater or corrosion at the module, a speaker or their connectors
- PossibleSupply, ground or LIN/CAN wiring of the module faulty
- Less likelyPedestrian alert control module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pedestrian alert moduleCAN bus wiring
What each part of U013F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3F | The exact fault in that area. |
What to do next
- Note U013F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U013F
What does U013F mean?
U013F means "Lost Communication With Pedestrian Alert Control Module". U013F reports that the pedestrian alert control module has gone silent. It is a generic code, so it means the same on every make.
Is it safe to drive with U013F?
U013F does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U013F fail an emissions test?
U013F is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U013F to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will U013F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.