P0E8B code meaning
Battery Charger B Input Voltage Sensor Circuit
What P0E8B means
P0E8B covers an electrical fault in the voltage measurement at the input of charger B: the controller gets no valid reading of the supply voltage. Range, low and high faults of this sensor have their own codes, P2E84, P2E85 and P2E86; charger A uses P0D3D for its first input voltage sensor. Some code lists call it input voltage sensor A of charger B. No manufacturer documents P0E8B publicly. Ford checks the voltage side of charger B through P0E87 with a 450 V limit, which is a judgment of the value, whereas P0E8B means the value cannot be read at all. CARB expects such inputs to be monitored for circuit continuity and range. The sensing is usually built into the charger, so after ruling out connectors the charger is the likely part. Charging is blocked until the fault clears.
P0E8B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E8B
- Plug-in charging is not possible
- Charging fault message or charge-port indicator signals a fault
Common causes of P0E8B
- Most likelyVoltage sensing circuit inside charger B defective
- PossibleLoose or corroded connector, damaged sensing lead
- Less likelyCharger software fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery charger b input voltage sensorWiring harnessOn board charger
What each part of P0E8B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8B | The exact fault in that area. |
What to do next
- Note P0E8B 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 P0E8B
What does P0E8B mean?
P0E8B means "Battery Charger B Input Voltage Sensor Circuit". P0E8B covers an electrical fault in the voltage measurement at the input of charger B: the controller gets no valid reading of the supply voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E8B?
P0E8B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0E8B fail an emissions test?
P0E8B 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 P0E8B to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0E8B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.