OBD Guide
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P1B64

Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage

P1B64 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage. Common causes: problems with contacts in circuit 43, degradation of battery cell no. 43. Estimated repair cost: $56–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–556 (est.)

Symptoms

  • Reduced vehicle power
  • Switching to emergency mode
  • Check Engine Light Illuminates
  • Reduced electric range
  • Uneven operation of the power plant

Causes

  • Problems with contacts in circuit 43
  • Degradation of battery cell No. 43
  • Voltage control system malfunction
  • Wiring harness damage
  • Software error in the control unit

How to Fix

  1. Check contacts and connectors of circuit 43
  2. Test the voltage on battery cell No. 43
  3. Inspect the wiring harness for damage
  4. Diagnose the battery management system
  5. Replace a damaged battery cell if necessary

Related codes

P1B63P1B65P0AA6

FAQ

What does the P1B64 code mean?

P1B64 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage

What causes a P1B64 error code?

The most common causes of P1B64 include: Problems with contacts in circuit 43; Degradation of battery cell No. 43; Voltage control system malfunction; Wiring harness damage.

How do I fix a P1B64 diagnostic trouble code?

To fix P1B64: Check contacts and connectors of circuit 43. Test the voltage on battery cell No. 43. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B64?

Limited driving only, diagnose soon

How much does it cost to fix P1B64?

The estimated repair cost for P1B64 is $56–556. Actual cost depends on your vehicle, location, and labor rates.

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