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.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Symptoms
- 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
Most likely causes
- Short circuit in an HV consumer on the protected branch
- False detection by the battery management or DC/DC wake-up fault
- Faulty voltage measurement behind the fuse
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- It can trigger limp mode.
What each character of P0E2F means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- E: Subsystem depends on the code range
- 2F: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0E2F?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P0E2F?
The most common causes are: short circuit in an HV consumer on the protected branch; false detection by the battery management or DC/DC wake-up fault; faulty voltage measurement behind the fuse.
Related codes
Sources
- static.nhtsa.gov: MC 11006636 0001
- static.nhtsa.gov: MC 11027903 0001
- static.nhtsa.gov: MC 11021800 0001
- static.nhtsa.gov: MC 10217174 0001
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.