What it means
Same as P05A7 on shutter B. 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 supply voltage circuit powers active grille shutter B's actuator. This code sets when the control module detects that the feed is below its expected range, which may leave B slow or unable to move.
Common causes
Most likely first.
- Supply voltage low
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check-engine light
- Shutter B may move slowly or fail to operate
- Cooling fan may run more often
How to diagnose it
- Record freeze-frame data and use a scan tool to check whether shutter B moves slowly or fails when commanded.
- Inspect B's supply wiring and connector for chafing, corrosion, loose terminals, or a poor connection.
- Check system voltage and charging condition to see whether low vehicle voltage is affecting the actuator supply.
- Measure voltage at shutter B's supply circuit under the conditions specified by the manufacturer.
- If the wiring and vehicle voltage are sound, test the actuator and its supply path for excessive electrical resistance.
Common fixes
- Clean or repair corroded or loose supply-circuit terminals.
- Repair chafed wiring or a high-resistance connection in B's supply harness.
- Correct a battery or charging-system fault causing low system voltage.
- Replace a shutter B actuator that draws abnormally or fails its circuit test.
Can I keep driving?
Short, gentle trips are generally reasonable if engine temperature stays normal. Avoid heavy loads or extended idling if the cooling fan runs often, and stop 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.