What it means
A circuit fault is detected in the battery charger A input current sensor circuit. The reading may be unreliable.
At a glance
- The engine or gearbox may go into limp mode
How it works
Battery Charger A uses an input current sensor to report current entering the charger to the control module. P0D38 indicates a fault in that sensor circuit, so the module may not be able to trust the reading when managing charging.
Common causes
Most likely first.
- Sensor failed
- Wiring or connector fault
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Record freeze-frame data and check charging status and available live data to see whether the fault appears when a charging session starts or is interrupted.
- Inspect the accessible Battery Charger A input-current sensor connector and wiring for a loose fit, corrosion, damaged insulation, or pulled terminals.
- Check the sensor circuit's power, ground, signal, and continuity against the wiring diagram and manufacturer's specification.
- Compare the sensor signal with the charger input-current data available on the scan tool to check whether the signal is missing or implausible.
- If the wiring and connections are sound, test the Battery Charger A input-current sensor using the approved service procedure.
Common fixes
- Reseat and secure the Battery Charger A input-current sensor connector.
- Repair corroded terminals or damaged wiring in the sensor circuit.
- Replace the input-current sensor if circuit checks pass and the sensor signal remains faulty.
- Clear the code and confirm that a charging session proceeds without the fault returning.
Can I keep driving?
Charging may fail to start, stop unexpectedly, or run slowly, and the vehicle may limit charging operation. Do not depend on a full charge for a long trip; if the vehicle also reports a high-voltage system warning or reduced power, follow its stop and service instructions.
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.