OBD Guide
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P1B1E

Hybrid/Electric Vehicle Battery 29 Circuit High Voltage

P1B1E is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 29 Circuit High Voltage. Common causes: faulty 29th battery module, problems with balancing battery cells. Estimated repair cost: $167–889.

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

Symptoms

  • Check Engine light comes on
  • Hybrid system power reduction
  • Battery warning on instrument panel
  • Automatic shutdown of high voltage system
  • Extended charging time (for PHEV)

Causes

  • Faulty 29th battery module
  • Problems with balancing battery cells
  • Battery management system (BMS) malfunction
  • Damage to high voltage wires or connectors
  • Software error in battery controller

How to Fix

  1. Diagnosis of the status of the 29th battery module
  2. Checking the cell balancing system
  3. Diagnostics of BMS operation
  4. Checking the integrity of high-voltage wiring
  5. Repair only from an authorized dealer

Related codes

P1B1DP1B1FP0AA6

FAQ

What does the P1B1E code mean?

P1B1E is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 29 Circuit High Voltage

What causes a P1B1E error code?

The most common causes of P1B1E include: Faulty 29th battery module; Problems with balancing battery cells; Battery management system (BMS) malfunction; Damage to high voltage wires or connectors.

How do I fix a P1B1E diagnostic trouble code?

To fix P1B1E: Diagnosis of the status of the 29th battery module. Checking the cell balancing system. Diagnostics of BMS operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B1E?

Limited driving only, diagnose soon

How much does it cost to fix P1B1E?

The estimated repair cost for P1B1E is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat