Battery Charger Hybrid/EV Battery Output Voltage Sensor Circuit Intermittent/Erratic
What it means
The battery charger hybrid/EV battery output voltage sensor circuit is dropping out or jumping around instead of giving a steady signal. The charger uses this reading to control how much power goes into the high-voltage battery.
Can I keep driving? Usually yes, as this mostly affects charging; get it read if charging fails. Do not open high-voltage (orange) cables or covers yourself; leave that to a trained technician.
What this part does
This sensor measures the voltage that the on-board charger delivers to the high-voltage battery of a plug-in hybrid or electric vehicle. The charger control module compares it with the battery's voltage to control charging properly and avoid overcharging. It is part of a high-voltage circuit, so work on it is for trained people. A fault may interrupt or limit charging.
Common symptoms
What you'll notice
- Battery not charging properly
- Dash warning light for battery or charging system is illuminated
Common causes
Most likely first
- Faulty battery charger
- Loose or corroded battery charger connections
- Defective output voltage sensor
- Malfunctioning circuitry in the battery charger
- Incorrect voltage output setting on the battery charger
How to diagnose & fix
Work through it in order
- Check the battery connections and clean any corrosion or loose connections
- Inspect and replace the voltage sensor if it is faulty or damaged
- Check and replace any damaged wiring or connectors related to the voltage sensor circuit
Related codes
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