U0440Invalid Data Received From Pedestrian Alert Control Module
- Generic OBD-II code · Network
- How the car detects it
- U0440 points at the pedestrian alert control module, which drives the external speaker of electric and hybrid vehicles. FMVSS 141 in the US demands an audible signal while the vehicle stands with its propulsion active and at speeds below 30 km/h, so the module needs speed, gear and propulsion state and reports its own status back. A receiver sets U0440 when the module's frames arrive with invalid content. No manufacturer documents U0440 publicly; Ford names the part PACM, for instance in bulletin 21-2271 about a rattle from its connector in the 2020-21 Escape Hybrid. The likely result is a warning about the pedestrian alert system: the car stays drivable, but may be quieter than the rule allows at low speed. U013F is lost contact.
- What you may notice
- Pedestrian alert system warning in the cluster
- No external sound at low speed
- Likely causes
- PossibleLoose or vibrating connector at the alert module
- PossibleAlert module software not matched to the vehicle
- RareInternal fault of the pedestrian alert module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.