P0D3D: Battery Charger A Input Voltage Sensor A Circuit
What to do
The car will drive normally. Charging may be slow, or the predicted charge time may be consistently wrong. Worth mentioning both when you book it in — the wrong estimate is a symptom, not a quirk.
What this code means
The circuit for the sensor measuring the alternating-current supply voltage at the charger is faulty.
This sensor is how the car knows what kind of supply it is plugged into. A charger designed for both 120 and 240 volt regions has to work out which one it is looking at before it can decide anything else — how much current to draw, how long the charge will take, whether the estimate it shows the driver is worth anything.
So a fault here produces confidently wrong information rather than an obvious failure. A charger that misreads a 240-volt supply as 120 charges at half the rate it could and tells the driver a completion time built on the same mistake. Nothing appears broken; the car is just slow, and the estimate is always wrong in the same direction.
It is also the sensor behind P0D27 and P0D28, so a supply-voltage complaint should always be checked against this circuit before the supply is blamed.
The base circuit fault: the signal is missing or outside any plausible range for a working sensor.
Likely causes
Start here
- Faulty on-board charger · specialist
- Corroded or loose connector · specialist
Less common
- Open circuit in sensor wiring · specialist
- Damaged wiring harness · specialist
- Failed sensor reference voltage supply · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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