OBD Guide
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P1E79

Hybrid/Electric Vehicle Battery 78 Circuit

P1E79 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 78 Circuit. Common causes: damage to the wiring to module 78, poor contact in connectors. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Reduced vehicle power
  • Switching to emergency mode
  • Reducing electric range
  • Check Engine Light Illuminates
  • Error message on the instrument panel

Causes

  • Damage to the wiring to module 78
  • Poor contact in connectors
  • Battery module fault 78
  • Problems with the cell balancing system
  • Battery control module malfunction

How to Fix

  1. Check the integrity of wiring and connectors
  2. Test the resistance of the battery module 78
  3. Check the cell balancing system
  4. Replace the faulty battery module if necessary
  5. Scan other related systems

Related codes

P1E78P1E80P0AA6

FAQ

What does the P1E79 code mean?

P1E79 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 78 Circuit

What causes a P1E79 error code?

The most common causes of P1E79 include: Damage to the wiring to module 78; Poor contact in connectors; Battery module fault 78; Problems with the cell balancing system.

How do I fix a P1E79 diagnostic trouble code?

To fix P1E79: Check the integrity of wiring and connectors. Test the resistance of the battery module 78. Check the cell balancing system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1E79?

Limited driving only, diagnose soon

How much does it cost to fix P1E79?

The estimated repair cost for P1E79 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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