Faulty current sensor internal to the battery charger assembly; Damaged or corroded wiring between the current sensor and the control module; Poor electrical connection at the sensor or module connector; Open circuit or high resistance in the sensor signal circuit; Short to ground on the sensor signal circuit; Failed control module not providing correct reference voltage; Water intrusion or physical damage to the charger housing affecting the sensor

DTC codes / P0Exx · Hybrid propulsion / P0E8C

P0E8CBattery Charger B Current Sensor Circuit Low

Q: What does code P0E8C mean?

Battery Charger B Current Sensor Circuit Low. P0E8C indicates that the battery charger's current sensor circuit has reported a voltage or signal below the expected range to the control module. The computer detects this when the sensor output stays lower than the calibrated minimum for the given operating conditions, which prevents accurate monitoring of charger current.

P0E8C indicates that the battery charger's current sensor circuit has reported a voltage or signal below the expected range to the control module. The computer detects this when the sensor output stays lower than the calibrated minimum for the given operating conditions, which prevents accurate monitoring of charger current.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaHybrid propulsion

Symptoms you may notice

Illumination of the battery charger system warning light or service vehicle soon message
Often no symptoms besides the warning light, especially if the charger continues to function
Charger may fail to activate or may shut down intermittently
Reduced charging performance or longer charge times
Battery state of charge may not increase as expected during charging
Possible related fault codes in the battery charger control module

Common causes, most likely first

Faulty current sensor internal to the battery charger assembly
Damaged or corroded wiring between the current sensor and the control module
Poor electrical connection at the sensor or module connector
Open circuit or high resistance in the sensor signal circuit
Short to ground on the sensor signal circuit
Failed control module not providing correct reference voltage
Water intrusion or physical damage to the charger housing affecting the sensor

How to diagnose and fix it

Verify the code with a scan tool and check for any related faults in the battery charger system
Inspect the charger wiring harness and connectors for corrosion, damage, or loose pins
Measure the sensor signal voltage at the control module connector and compare to specifications
Check the sensor reference voltage and ground circuits for continuity and shorts
Perform a wiggle test on the harness while monitoring sensor data to reveal intermittent faults
If wiring and connections are good, test or replace the current sensor or charger assembly as required
Clear the code and verify the repair by monitoring live data during a charging cycle

Current sensor faults often misdiagnosed

A low signal code can be set by a simple loose connector pin that only loses contact under vibration, so always perform a thorough wiggle test before condemning the sensor.
The current sensor is frequently integrated into the battery charger assembly, meaning a sensor fault may require replacing the entire charger rather than a separate component.
Corrosion inside the charger housing from water intrusion can cause the sensor signal to short low, and this is often overlooked when only the external wiring is inspected.
This code does not always mean the charger has failed; a faulty control module reference voltage can pull the sensor signal low and mimic a sensor failure.
Related codes such as P0E8A or P0E8B may also be present and should be diagnosed together to avoid replacing parts unnecessarily.

Can I keep driving with P0E8C?

If the vehicle is a plug-in hybrid or electric model, avoid relying on charging until the fault is repaired, as the charger may not operate correctly. The vehicle can generally be driven in conventional mode, but schedule service soon to prevent battery drain or further electrical issues.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.