P0E30High Voltage Fuse C
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P0E30 is the code for a third fuse in the high-voltage system, after A (P0A95) and B (P0E2F). No manufacturer documents P0E30 publicly. How such a fuse is checked can be seen from the siblings: Volvo and Polestar have the battery control module compare the voltage measured after each fuse output with the pack voltage, and Porsche numbers its Taycan fuses as fuse and fuse 2 under P0A95 and P0E2F. A pack with only two fused branches never sets P0E30. What the third fuse protects, for example a heater, compressor or charger branch, is decided by the maker. If it opens, the consumers on that branch lose power; a blown fuse normally follows a short circuit that has to be found before the fuse or the battery unit is replaced.
- What you may notice
- HV system warning message
- Consumers on the affected branch without function
- Likely causes
- LikelyShort circuit in a consumer on the third fused branch
- PossibleFaulty voltage measurement behind the fuse
- RareSoftware error in the battery control module
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €8,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.