P0EF9

Battery Charger A Input Voltage Sensor B Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Battery charging problems
Reduced hybrid system performance (if applicable)
Possible problems starting the engine

Causes

Input Voltage Sensor B fault
Open or short circuit in the sensor circuit
Poor contact in sensor connectors
Charger fault
Problems with the control unit

How to Fix

Check the integrity of the sensor circuit
Check sensor connectors and contacts
Check the functionality of input voltage sensor B
Check the charger for faults
If necessary, replace the sensor or charger

Related codes

P0EFA P0EFB P0EF8