OBD Guide
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P1B5E

Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage

P1B5E is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage. Common causes: battery fault #41, problems with balancing battery cells. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Hybrid system power reduction
  • Check Engine light comes on
  • Reducing electric range
  • Problems with charging a high-voltage battery
  • The car goes into emergency mode

Causes

  • Battery fault #41
  • Problems with balancing battery cells
  • Battery management system (BMS) malfunction
  • Damage to high voltage wires or connectors
  • Problems with contacts in the battery circuit

How to Fix

  1. Diagnostics of voltage of all battery cells
  2. Checking the integrity of high voltage connections
  3. Battery Management System (BMS) Testing
  4. Replacing faulty battery cells
  5. Reflashing or replacing the BMS module if necessary

Related codes

P1B5DP1B5FP0AA6

FAQ

What does the P1B5E code mean?

P1B5E is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage

What causes a P1B5E error code?

The most common causes of P1B5E include: Battery fault #41; Problems with balancing battery cells; Battery management system (BMS) malfunction; Damage to high voltage wires or connectors.

How do I fix a P1B5E diagnostic trouble code?

To fix P1B5E: Diagnostics of voltage of all battery cells. Checking the integrity of high voltage connections. Battery Management System (BMS) Testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B5E?

Do not drive — repair immediately

How much does it cost to fix P1B5E?

The estimated repair cost for P1B5E is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat