OBD Guide
ENFRDEESPT

P1E78

Hybrid/Electric Vehicle Battery 77 Circuit

P1E78 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 77 Circuit. Common causes: damage to the high voltage battery circuit, poor contact in connectors. Estimated repair cost: $56–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–556 (est.)

Symptoms

  • Reduced vehicle power
  • Check Engine Light Illuminated
  • Reduced performance of the hybrid system
  • The car goes into emergency mode
  • Battery charging problems

Causes

  • Damage to the high voltage battery circuit
  • Poor contact in connectors
  • Battery module failure
  • Problems with the battery management system
  • Contact corrosion

How to Fix

  1. Check the integrity of the high-voltage battery circuit
  2. Inspect and clean all contacts
  3. Check the condition of the battery modules
  4. Scan the battery management system for errors
  5. Replace damaged components if necessary

Related codes

P1E79P0AA6P0AC0

FAQ

What does the P1E78 code mean?

P1E78 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 77 Circuit

What causes a P1E78 error code?

The most common causes of P1E78 include: Damage to the high voltage battery circuit; Poor contact in connectors; Battery module failure; Problems with the battery management system.

How do I fix a P1E78 diagnostic trouble code?

To fix P1E78: Check the integrity of the high-voltage battery circuit. Inspect and clean all contacts. Check the condition of the battery modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1E78?

Limited driving only, diagnose soon

How much does it cost to fix P1E78?

The estimated repair cost for P1E78 is $56–556. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat