P0B42
Hybrid/EV Battery Voltage Sense B Circuit Low
P0B42 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense B Circuit Low. Common causes: high voltage battery fault, problems with voltage sensors. Estimated repair cost: $56–556.
Symptoms
- Reduced engine power
- Switching to emergency mode
- Check Engine Light Illuminates
- Reduced hybrid system efficiency
- Battery warning on instrument panel
Causes
- High voltage battery fault
- Problems with voltage sensors
- Open or short circuit in wiring
- Contact corrosion in a high voltage system
- Battery management module malfunction
How to Fix
- High voltage battery diagnostics
- Checking voltage sensors and their circuits
- Inspection and testing of high voltage wiring
- Checking connections and contacts in the system
- Updating the battery management module software (if necessary)
Related codes
Error P0B42 by Vehicle Brand
FAQ
What does the P0B42 code mean?
P0B42 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense B Circuit Low
What causes a P0B42 error code?
The most common causes of P0B42 include: High voltage battery fault; Problems with voltage sensors; Open or short circuit in wiring; Contact corrosion in a high voltage system.
How do I fix a P0B42 diagnostic trouble code?
To fix P0B42: High voltage battery diagnostics. Checking voltage sensors and their circuits. Inspection and testing of high voltage wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B42?
Limited driving only, diagnose soon
How much does it cost to fix P0B42?
The estimated repair cost for P0B42 is $56–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat