P0B71
Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic
P0B71 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic. Common causes: poor contact in voltage control circuit connectors, broken or damaged wiring. Estimated repair cost: $17–133.
Symptoms
- Unstable operation of the hybrid system
- Reducing electric range
- Check Engine Light Illuminates
- The car goes into emergency mode
- Reduced engine power
Causes
- Poor contact in voltage control circuit connectors
- Broken or damaged wiring
- Battery voltage sensor fault
- Corrosion of contacts in the circuit
- Problems with the Battery Monitoring Module (BMS)
How to Fix
- Voltage Control Circuit Diagnostics
- Checking the condition of connectors and contacts
- Testing battery voltage sensors
- Checking wiring integrity
- BMS module software update
Related codes
Error P0B71 by Vehicle Brand
FAQ
What does the P0B71 code mean?
P0B71 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic
What causes a P0B71 error code?
The most common causes of P0B71 include: Poor contact in voltage control circuit connectors; Broken or damaged wiring; Battery voltage sensor fault; Corrosion of contacts in the circuit.
How do I fix a P0B71 diagnostic trouble code?
To fix P0B71: Voltage Control Circuit Diagnostics. Checking the condition of connectors and contacts. Testing battery voltage sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B71?
Yes, but get it checked soon
How much does it cost to fix P0B71?
The estimated repair cost for P0B71 is $17–133. Actual cost depends on your vehicle, location, and labor rates.
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