What it means
The signal from the battery charger A input current sensor is above the expected electrical range. The reading may be unreliable.
At a glance
- The engine or gearbox may go into limp mode
How it works
Battery Charger A's input-current sensor reports current entering the charger to the control module. P0D3B sets when the sensor signal is above its expected electrical range, which can result from a signal wire shorted to battery voltage or an open sensor.
Common causes
Most likely first.
- Signal wire shorted to B+
- Open sensor
- Connector pins corroded - high contact resistance
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Save freeze-frame data and check the live Battery Charger A input-current sensor signal to confirm it is high when the code sets.
- Inspect the sensor connector and accessible wiring for a disconnected plug, an open conductor, corrosion, or damaged insulation.
- Check whether the sensor signal wire is shorted to battery voltage, and test sensor power, ground, and continuity against the wiring diagram and manufacturer's specification.
- Compare the sensor signal with available charger input-current data to check whether the high reading is inconsistent with charging activity.
- If the wiring and connections are sound, test for an open or failed input-current sensor using the approved procedure.
Common fixes
- Reconnect and secure a loose sensor plug.
- Repair an open wire or a signal wire shorted to battery voltage.
- Correct corroded terminals or other poor connections in the circuit.
- Replace the sensor if testing confirms it is open or faulty.
Can I keep driving?
Charging may fail to start, stop, or proceed slowly because the module receives an abnormally high input-current signal. Avoid depending on a complete charge, and stop safely if the vehicle also limits power or displays a high-voltage system warning.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.