OBD-II code · Powertrain (generic)
P05B3 Active Grille Air Shutter B Control Circuit High
Same as P05A4 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.
Is it safe to drive with P05B3?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl line shorted to supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Active Grille Actuator B
Related codes
- P05A4Active Grille Air Shutter A Control Circuit High
- P05B0Active Grille Air Shutter B Position Sensor Minimum or Maximum Stop Performance
- P05B1Active Grille Air Shutter B Control Circuit Open
- P05B2Active Grille Air Shutter B Control Circuit Range or Performance
- P05B4Active Grille Air Shutter B Control Circuit Low
- P05B5Active Grille Air Shutter B Supply Voltage Circuit Open
- P05B6Active Grille Air Shutter B Supply Voltage Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.