P2D84 code meaning
Battery Charger B Input Current Sensor Circuit High
What P2D84 means
P2D84 is the high-side fault of charger B's input current sensor: its signal climbs above what the measuring range allows. No manufacturer documents P2D84 publicly, so the A-side code P0D3B serves as reference. For the 2022 Outlander PHEV, Mitsubishi counts half a second of sensor output above 4.658 V (around +54 A) as a supply-side short and halts charging. GM's Volt module of 2011 sets its Type A fault once more than 24.78 A of AC is reported in 160 out of 200 ms. Real currents of that size would exceed what the charger draws by design, so the fault almost always lies in the measuring chain. P2D84 differs from P0E89, where the current is judged too high, not the sensor. Low counterpart: P2D83.
P2D84 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2D84
- AC charging does not start or stops within seconds
- Charging fault warning in the cluster
Common causes of P2D84
- Most likelyCharger B current sensor output shorted toward its supply inside the unit
- PossibleCurrent sensor of charger B failed (charger repair or replacement)
- Less likelyReference or ground of the sensor lost, pushing the signal up
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 current sensorOn board charger
What each part of P2D84 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 84 | The exact fault in that area. |
What to do next
- Note P2D84 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 P2D84
What does P2D84 mean?
P2D84 means "Battery Charger B Input Current Sensor Circuit High". P2D84 is the high-side fault of charger B's input current sensor: its signal climbs above what the measuring range allows. It is a generic code, so it means the same on every make.
Is it safe to drive with P2D84?
P2D84 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2D84 fail an emissions test?
P2D84 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 P2D84 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P2D84 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.