OBD Guide
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P1B46

Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage

P1B46 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage. Common causes: battery cell 33 degradation, poor contact in battery connectors. Estimated repair cost: $167–889.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–889 (est.)

Symptoms

  • Reduced vehicle power
  • Reducing electric range
  • Check Engine Light Illuminates
  • The vehicle goes into emergency mode
  • Hybrid system warning

Causes

  • Battery cell 33 degradation
  • Poor contact in battery connectors
  • Faulty cell balancing system
  • Damage to wiring harness to cell 33
  • Problems with the Battery Management Module (BMS)

How to Fix

  1. Diagnosis of battery cell status 33
  2. Checking battery connections and connectors
  3. Testing the cell balancing system
  4. Checking the integrity of the wiring harness
  5. Replacing a faulty battery cell or module

Related codes

P1B45P1B47P0AA6

FAQ

What does the P1B46 code mean?

P1B46 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 33 Circuit Low Voltage

What causes a P1B46 error code?

The most common causes of P1B46 include: Battery cell 33 degradation; Poor contact in battery connectors; Faulty cell balancing system; Damage to wiring harness to cell 33.

How do I fix a P1B46 diagnostic trouble code?

To fix P1B46: Diagnosis of battery cell status 33. Checking battery connections and connectors. Testing the cell balancing system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B46?

Limited driving only, diagnose soon

How much does it cost to fix P1B46?

The estimated repair cost for P1B46 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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