OBD-II code · Powertrain (generic)
P05A8 Active Grille Air Shutter A Supply Voltage Circuit High
Same as P05A6 with supply voltage above the plausible range. 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.
Is it safe to drive with P05A8?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply voltage above design range
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Usually unaffected
- Parts involved
- Active Grille Actuator A
Related codes
- P05B7Active Grille Air Shutter B Supply Voltage Circuit High
- P05A5Active Grille Air Shutter A Control Circuit Low
- P05A6Active Grille Air Shutter A Supply Voltage Circuit Open
- P05A7Active Grille Air Shutter A Supply Voltage Circuit Low
- P05A9Active Grille Air Shutter B Position Sensor Circuit
- P05AAActive Grille Air Shutter B Position Sensor Range or Performance
- P05ABActive Grille Air Shutter B Position Sensor Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.