P05B0Active Grille Air Shutter B Position Sensor Minimum/Maximum Stop Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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. P05B0 checks whether shutter B reaches its end stops, the reference for position feedback in the self-learning run. Ford's 3.0 L diesel sets it at over 40° when learning closed, 20° when learning open or 20° in operation, after 10 s. Ford's petrol F-150 of 2024–25 uses it too: a Ford service message says to fit a new lower shutter before further diagnosis.
- What you may notice
- Check engine light on
- Lower shutter not moving fully
- Possibly also P05AE
- Likely causes
- LikelyLower shutter or actuator faulty
- PossibleLouvres blocked or bent (ice, stone chips, impact)
- PossibleShutter misassembled or connector off after repair
- RareConnector or harness corroded
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €100 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.