OBD Guide
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P1EA4

Hybrid/EV Battery Interface Control Module 4 Cell Balancing Circuit

P1EA4 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 4 Cell Balancing Circuit. Common causes: battery management module malfunction, damage to cell balancing circuit. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Reduced electric range
  • Extending battery charging time
  • Unstable operation of the hybrid system
  • Check Engine Light Illuminated
  • Reduced overall vehicle performance

Causes

  • Battery management module malfunction
  • Damage to cell balancing circuit
  • Wiring Harness Problems
  • Malfunction of individual battery cells
  • Software error in control module

How to Fix

  1. Check the integrity of the cell balancing circuit
  2. Diagnose the battery control module
  3. Check the condition of the wiring harness
  4. Test individual battery cells
  5. Update control module software

Related codes

P1EA1P1EA2P1EA3

FAQ

What does the P1EA4 code mean?

P1EA4 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 4 Cell Balancing Circuit

What causes a P1EA4 error code?

The most common causes of P1EA4 include: Battery management module malfunction; Damage to cell balancing circuit; Wiring Harness Problems; Malfunction of individual battery cells.

How do I fix a P1EA4 diagnostic trouble code?

To fix P1EA4: Check the integrity of the cell balancing circuit. Diagnose the battery control module. Check the condition of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1EA4?

Yes, but get it checked soon

How much does it cost to fix P1EA4?

The estimated repair cost for P1EA4 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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