OBD Guide
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P1B87

Hybrid/Electric Vehicle Battery 55 Circuit Performance

P1B87 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 55 Circuit Performance. Common causes: battery module degradation 55, battery cell imbalance. Estimated repair cost: $167–889.

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

Symptoms

  • Hybrid system power reduction
  • Reducing electric range
  • Check Engine Light Illuminates
  • Switching to emergency mode
  • Reduced efficiency of regenerative braking

Causes

  • Battery module degradation 55
  • Battery cell imbalance
  • Problems with the battery cooling system
  • Malfunction of temperature or voltage sensors
  • Damage to module wiring or contacts

How to Fix

  1. Diagnosis of battery module status 55
  2. Checking battery cell balancing
  3. Testing the battery cooling system
  4. Checking the integrity of wiring and contacts
  5. Replacing a faulty module if necessary

Related codes

P1B88P0AA6P0A7F

FAQ

What does the P1B87 code mean?

P1B87 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 55 Circuit Performance

What causes a P1B87 error code?

The most common causes of P1B87 include: Battery module degradation 55; Battery cell imbalance; Problems with the battery cooling system; Malfunction of temperature or voltage sensors.

How do I fix a P1B87 diagnostic trouble code?

To fix P1B87: Diagnosis of battery module status 55. Checking battery cell balancing. Testing the battery cooling system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B87?

Limited driving only, diagnose soon

How much does it cost to fix P1B87?

The estimated repair cost for P1B87 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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