Chassis, generic

C0601 Active Air Dam Control Circuit/Open

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

An active air dam is a panel below the front bumper that an electric drive lowers at speed to reduce drag and raises for slow driving, towing or rough ground. Ford's patent for this design moves the panel with two motor-driven screw jacks under command of the PCM or body module over LIN or CAN; a GM patent closes the loop with position, motor current and back-EMF feedback. C0601 means the drive path to the actuator is open: the controller switches its output on, yet no load current flows. Integrated motor drivers such as TI's DRV8873-Q1 report exactly this as an open load. No maker documents C0601 publicly; Ford and Stellantis only publish the performance code C0604. The panel usually stays where it last stopped.

Likely causes

Actuator connector loose, unplugged or corroded after water entry

Wire broken in the exposed harness behind the bumper, often after impact or road debris

Open motor winding or internal fault in the air dam actuator

Symptoms

Active Air Dam System Fault message in the cluster
Air dam no longer moves and stays raised or lowered
Slightly higher fuel use on the highway when stuck raised

Repair estimate

DifficultyMediumDIY possible

Parts and labour€30–600

Time0.5–2 h

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

Parts involved

active air dam actuatoractive air dam module

References: patents.google.com, patents.google.com, ti.com, static.nhtsa.gov.