P0E2FHigh Voltage Fuse B
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P0E2F says the battery management has found a second high-voltage fuse open, or believes it has. Several makers use it. Mercedes calls it electrical fuse B, the battery-internal fuse protecting auxiliary HV consumers in its plug-in hybrids: a shorted belt starter-alternator or another short in that line blows it, the engine no longer starts and only electric driving remains; once the short is fixed, the 2024 bulletin for series 206, 223, 254 and 290 has the HV battery replaced. On EQB models a DC/DC wake-up fault can set it without a blown fuse. Porsche lists it as fuse 2 on the 2020-22 Taycan, which is then not ready to drive. Volvo and Polestar compare the voltages after the front and rear fuse outputs with pack voltage. Main fuse: P0A95.
- What you may notice
- Engine does not start, electric driving only (plug-in hybrids)
- Vehicle not ready to drive or propulsion warning
- MIL or HV drive system warning on
- Likely causes
- LikelyShort circuit in an HV consumer on the protected branch
- PossibleFalse detection by the battery management or DC/DC wake-up fault
- RareFaulty voltage measurement behind the fuse
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €15,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.