Shutter vanes or linkage jammed by debris, ice, road dirt or damage to the front end; Faulty active grille shutter actuator or motor; Broken or detached shutter vane, linkage or mounting clip, often after minor front-end impact; Damaged wiring, corroded connector or poor earth or supply to the actuator; Faulty position feedback sensor within the actuator; Fault in the control unit driving the actuator, or an outdated calibration where the manufacturer has issued a correction.

P05AE

Active Grille Air Shutter B Performance/Stuck Off.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
5: AreaVehicle speed, idle control and auxiliary inputs
AE: FaultThe specific fault in that area

What it means

P05AE is the generic code for Active Grille Air Shutter B Performance / Stuck Off. The control unit commands the shutters in the front grille to open or close, and it has detected that shutter bank B is not following the command or is stuck in the off (not active) position. Which shutter bank is 'B' and how the position is monitored depends on the model.

Symptoms

Engine management warning light on
Engine or transmission running hotter than usual in traffic or on hot days
Air conditioning performing poorly at low speed
Slightly higher fuel consumption at motorway speeds
Shutters visibly not moving when the ignition is switched on, or rattling or buzzing noise from the grille area

Possible causes

Shutter vanes or linkage jammed by debris, ice, road dirt or damage to the front endlikely
Faulty active grille shutter actuator or motorlikely
Broken or detached shutter vane, linkage or mounting clip, often after minor front-end impactpossible
Damaged wiring, corroded connector or poor earth or supply to the actuatorpossible
Faulty position feedback sensor within the actuatorpossible
Fault in the control unit driving the actuator, or an outdated calibration where the manufacturer has issued a correctionrare

How to diagnose

Read all stored codes and freeze frame data, and note whether other grille shutter, coolant temperature or fan codes are present
Visually inspect the grille, bumper and shutter assembly for damage, debris, ice or a loose or broken vane
With the ignition on, listen and watch for shutter movement, and try moving the vanes by hand (engine off) to check for binding
Inspect the actuator wiring and connector for chafing, water ingress, corrosion and bent or pushed-back pins
Use a scan tool with bidirectional functions to command the shutters open and closed and compare commanded against actual position
Check the supply voltage, earth and signal at the actuator connector against the manufacturer wiring information
Check coolant temperature and cooling fan operation to make sure the engine is not overheating while the shutters are stuck
Check for any manufacturer software updates or service bulletins for your model if hardware tests are fine

How to fix

Clear debris or ice and free the shutter vanes, replacing any that are damaged or seized
Replace the grille shutter actuator or the complete shutter assembly if it is faulty or the feedback is out of range
Repair or replace damaged wiring and connectors, and restore good supply and earth
Refit or replace broken linkages, clips and mountings after front-end damage
Apply a manufacturer calibration update only where an updated calibration is a documented fix for the model

Can I keep driving?

Low severity

The car can normally be driven and booked in for repair, as the shutters usually fail in a position that still allows cooling. Keep an eye on the temperature gauge, and stop if the engine begins to overheat.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.