P2E8D code meaning
Battery Charger B Charge Sequence Signal 1 Circuit Low
What P2E8D means
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.
P2E8D at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E8D
- DC fast charging does not start
- Station reports a communication or vehicle error
- AC charging unaffected
Common causes of P2E8D
- Most likelySequence signal 1 line shorted to ground
- PossibleOpen wire or damaged pin 2 in the DC inlet
- PossibleFast charger not closing its switch d1
- Less likelyFaulty input stage in the evaluating control unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery charger b charge seq signal 1Charge portWiring harness
What each part of P2E8D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8D | The exact fault in that area. |
What to do next
- Note P2E8D and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2E8D
What does P2E8D mean?
P2E8D means "Battery Charger B Charge Sequence Signal 1 Circuit Low". P2E8D means the vehicle finds the first CHAdeMO sequence line low while the fast charger should be driving it. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E8D?
P2E8D does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2E8D fail an emissions test?
P2E8D is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2E8D to fix?
Difficulty: medium. A typical repair takes 0.3 to 4 hours of work. This is a job for a workshop.
Will P2E8D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.