Network, generic

U0290 Lost Communication With Active Aerodynamic Feature Control Module D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Module D is the last of four aerodynamic control addresses and fits vehicles in which aerodynamics are integrated with chassis functions. Ford's Mustang GTD is such a case: its hydraulic system serves both the suspension and the active aero elements, and service message SSM 55237 lists the warning Active Aero Fault together with suspension and front lift messages, caused by vehicle dynamics module software that reports faults wrongly and fixed by reprogramming. U0290 means that controller has lost the fourth aero module entirely. No manufacturer documents U0290 publicly or says which element module D drives. Depending on the design, a failure can freeze one element or cause the vehicle to restrict modes and top speed. For CARB, such parts are active off-cycle technology.

Likely causes

Software of module D or the vehicle dynamics controller
Bus or supply wiring to module D damaged
Moisture or corrosion at the connector of module D
Module D internally failed

Symptoms

  • Active aero fault message
  • Drive modes or top speed restricted
  • Aero element stuck in one position

Repair estimate

DifficultyHardWorkshop job
Parts and labour€0–2,000
Time0.5–4 h

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

Parts involved

active aero module dvehicle bus wiring

Related codes

U028DU028EU028F

References: static.nhtsa.gov, law.cornell.edu.