Powertrain, generic (extended)

P2E8D Battery Charger B Charge Sequence Signal 1 Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E8D means the vehicle finds the first CHAdeMO sequence line low while the fast charger should be driving it. Signal 1 is the opening move of a session: once the plug is detected the station closes d1 and applies 12 V, and only after that does the CAN exchange of battery limits begin. If the vehicle side sees no voltage, the session stalls before any current flows. The line can also supply contactor coils in the car, which is why the standard allows up to 2 A on it; a short to ground therefore loads the station switch hard. No manufacturer documents P2E8D publicly. Reasons include a short to ground, a broken wire or pin 2 contact, a corroded inlet, and, on the station side, a switch d1 that never closes, so trying another charger helps narrow it down. The high counterpart is P2E8C.

Likely causes

Sequence signal 1 line shorted to ground
Open wire or damaged pin 2 in the DC inlet
Fast charger not closing its switch d1
Faulty input stage in the evaluating control unit

Symptoms

  • DC fast charging does not start
  • Station reports a communication or vehicle error
  • AC charging unaffected

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,500
Time0.3–4 h

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

Parts involved

battery charger b charge seq signal 1charge portwiring harness

Related codes

P2E8CP2E8EP2E8F

References: ti.com, cache.industry.siemens.com, openchargealliance.org.