P0D40 code meaning
Battery Charger A Input Voltage Sensor A Circuit High
Powertrain system Generic code P0Dxx codes Check engine light
What P0D40 means
P0D40 is the high-signal fault of the charger's input voltage sensor. GM's Volt charger module (2011 and 2014 tables) sets it when the measured AC peak exceeds 422 V for 160 of 200 ms and lights the MIL as a Type A fault; in the 2016 and 2019 Volt the controller reads a duty-cycle signal and fails it at 92 % and above or at a constant 0 %, Type B over two trips. Mitsubishi's 2022 Outlander PHEV reads a sensor voltage above 3.161 V, corresponding to more than 492 V, for 0.5 s as a short to power, stops charging and replaces the charger/DC-DC unit. Household and Level 2 supplies do not reach these values, so the sensor path or the signal line is normally to blame. P0D3F is the low counterpart.
P0D40 at a glance
- Check engine lightYes, usually on
- 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 P0D40
- AC charging is refused
- MIL on (GM)
Common causes of P0D40
- Most likelyVoltage sensor signal shorted to supply inside the charger
- PossibleOpen duty-cycle signal line between charger and controller (2016-2019 Volt)
- PossibleFailed on-board charger
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery charger a input voltage sensor aOn board charger
What each part of P0D40 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 40 | The exact fault in that area. |
What to do next
- Note P0D40 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 P0D40
What does P0D40 mean?
P0D40 means "Battery Charger A Input Voltage Sensor A Circuit High". P0D40 is the high-signal fault of the charger's input voltage sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D40?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0D40 fail an emissions test?
P0D40 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 P0D40 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0D40 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.