What it means
Same as P05A2 with the control line shorted to supply. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
How it works
The control circuit supplies commands to the Active Grille Air Shutter A actuator, and the control module monitors the circuit as it operates the shutters. This code sets when the control line reads higher than its plausible range, consistent with a short to a supply source, and the shutters may stop responding.
Common causes
Most likely first.
- Control line shorted to supply
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check-engine light
- Active grille shutter warning, if equipped
- Shutters may remain in one position
How to diagnose it
- Save freeze-frame data and check Shutter A command and status to see whether the fault occurs during actuator operation.
- Inspect the actuator connector and harness for moisture, corrosion, backed-out pins, or insulation rubbed against a power wire.
- Trace the control wire for pinching or chafing near battery-positive or other supply wiring.
- Using the vehicle wiring diagram, check whether the control line is shorted to supply and inspect terminal condition while the fault is present.
- If wiring checks out, test actuator and module circuit behavior according to the manufacturer's procedure.
Common fixes
- Repair the control wire where it is pinched or shorted to a supply wire.
- Clean and secure corroded or loose Shutter A actuator connector terminals.
- Replace damaged connector seals or terminals that allow moisture or poor contact.
- Replace the actuator or repair the module only if wiring tests show the fault originates there.
Can I keep driving?
Shutter A may remain in one position, so watch the engine temperature, particularly in hot weather or under load. Stop safely if the engine overheats.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.