Hybrid/EV Battery Pack Voltage Sense C Circuit Intermittent/Erratic
What it means
The battery pack voltage sense C circuit is cutting in and out or jumping around, so the signal cannot be trusted. The battery management system uses this reading to track pack voltage and decide how much power the battery can give or accept.
Can I keep driving? Usually drivable in the short term, but the car may limit power or shut down the high-voltage system, so get it read soon. Do not touch orange high-voltage cables or open the battery; leave that to a trained technician.
What this part does
The high-voltage battery pack is the large assembly of cells, wiring and sensors that stores the energy used to drive a hybrid or electric vehicle. The battery control system monitors it continuously and tells the rest of the vehicle how much power it can supply or accept. It carries dangerous voltage, so work on it is for trained people. Problems may cause a warning, reduced range or power, or a car that will not start.
Common symptoms
What you'll notice
- Check engine light illumination
- Poor acceleration or lack of power
- Intermittent loss of power while driving
Common causes
Most likely first
- Loose or corroded wiring or connections in the hybrid/EV battery pack voltage sensing circuit
- Faulty hybrid/EV battery pack voltage sensor
- Malfunctioning hybrid/EV battery management system
- Defective hybrid/EV battery pack controller
- Inconsistent or unstable voltage output from the hybrid/EV battery pack
How to diagnose & fix
Work through it in order
- Check the battery connections and ensure they are clean and tightly secured
- Inspect and test the battery voltage sensor for any damage or malfunction
- Check the wiring harness for any loose or damaged connections
- Check other stored error codes and address them in the order of significance
- Perform a complete battery and electrical system diagnosis to identify any other possible causes or related issues
Related codes
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