Powertrain, generic

P0E30 High Voltage Fuse C

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Short circuit in a consumer on the third fused branch
Faulty voltage measurement behind the fuse
Software error in the battery control module

Symptoms

  • HV system warning message
  • Consumers on the affected branch without function

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–8,000
Time1–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

high voltage fusebattery energy control module

Related codes

P0A95P0E2FP0E2E

References: static.nhtsa.gov, static.nhtsa.gov.