P2C86
Hybrid/EV Battery Voltage Internal Isolation Warning
P2C86 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Internal Isolation Warning. Common causes: damaged insulation inside the battery module, moisture entering the high-voltage compartment. Estimated repair cost: $167–556.
Symptoms
- Check engine light comes on
- A warning message appears on the dashboard
- Reduced vehicle power or performance
- The car may go into emergency mode
- Possible problems with battery charging
Causes
- Damaged insulation inside the battery module
- Moisture entering the high-voltage compartment
- Mechanical damage to the battery
- Corrosion of contacts or connections
- Insulation monitoring system malfunction
How to Fix
- Carry out diagnostics of the high-voltage system
- Check battery insulation resistance
- Inspect the battery module for damage
- Replace damaged battery cells
- Repair only from an authorized dealer
Related codes
Error P2C86 by Vehicle Brand
FAQ
What does the P2C86 code mean?
P2C86 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Internal Isolation Warning
What causes a P2C86 error code?
The most common causes of P2C86 include: Damaged insulation inside the battery module; Moisture entering the high-voltage compartment; Mechanical damage to the battery; Corrosion of contacts or connections.
How do I fix a P2C86 diagnostic trouble code?
To fix P2C86: Carry out diagnostics of the high-voltage system. Check battery insulation resistance. Inspect the battery module for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2C86?
Do not drive — repair immediately
How much does it cost to fix P2C86?
The estimated repair cost for P2C86 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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