P05AE code meaning
Active Grille Air Shutter B Performance/Stuck Off
Powertrain system Generic code P05xx codes Check engine light
What P05AE means
Shutter B is the second active grille shutter – at GM, Ford and Stellantis the lower one in the bumper. Shutters cut drag and speed warm-up when closed and open for cooling; CARB names them as an off-cycle CO2 technology and treats the actuator as an output component. Smart actuators report over LIN (loss of communication: U0285); a fault usually costs fuel and warm-up time, a closed shutter can make the engine run hot under load. P05AE compares commanded and reached position. GM checks in two stages with five clearing attempts, type B, two trips; Ford's 3.0 L diesel at over 6° deviation in operation or 20° when learning open; Stellantis uses it too. GM, Ford and Stellantis do not distinguish the direction. GM bulletins for 2019–21 Silverado and Sierra name stones or ice at the bottom of the lower shutter, often with U0285.
P05AE at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P05AE
- Check engine light on (GM after two trips)
- Lower shutter not moving or incompletely, possibly U0285 or P059F
- Higher coolant temperature under load or slightly higher consumption
Common causes of P05AE
- Most likelyDebris, stones, ice or snow in the lower shutter
- Most likelyLouvres unhooked or broken, rubbing on bracket or horn, impact damage
- PossibleWater or corrosion in connector or harness
- PossibleActuator B faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Grille shutter bGrille shutter actuator bActuator wiringEngine control module
What each part of P05AE means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| AE | The exact fault in that area. |
What to do next
- Note P05AE 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 P05AE
What does P05AE mean?
P05AE means "Active Grille Air Shutter B Performance/Stuck Off". Shutter B is the second active grille shutter – at GM, Ford and Stellantis the lower one in the bumper. It is a generic code, so it means the same on every make.
Is it safe to drive with P05AE?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P05AE fail an emissions test?
Yes, it can. P05AE is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P05AE to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P05AE clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.