P0B78
Hybrid/EV Battery Voltage Sense M Circuit Range/Performance
P0B78 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense M Circuit Range/Performance. Common causes: battery voltage sensor fault m, open or short circuit in the measurement circuit. Estimated repair cost: $28–167.
Symptoms
- Check Engine light comes on
- Reduced performance of the hybrid system
- Incorrect battery voltage readings
- Reducing electric range
- Possible battery charging problems
Causes
- Battery voltage sensor fault M
- Open or short circuit in the measurement circuit
- Poor contact in circuit connectors
- Problems with the hybrid system control module
- Corroded or damaged wiring
How to Fix
- Check the integrity of the voltage measurement circuit
- Inspect connectors and contacts for damage
- Test battery voltage sensor M
- Check the operation of the hybrid system control module
- Replace faulty circuit components
Related codes
Error P0B78 by Vehicle Brand
FAQ
What does the P0B78 code mean?
P0B78 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense M Circuit Range/Performance
What causes a P0B78 error code?
The most common causes of P0B78 include: Battery voltage sensor fault M; Open or short circuit in the measurement circuit; Poor contact in circuit connectors; Problems with the hybrid system control module.
How do I fix a P0B78 diagnostic trouble code?
To fix P0B78: Check the integrity of the voltage measurement circuit. Inspect connectors and contacts for damage. Test battery voltage sensor M. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B78?
Yes, but get it checked soon
How much does it cost to fix P0B78?
The estimated repair cost for P0B78 is $28–167. Actual cost depends on your vehicle, location, and labor rates.
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