P2C87

Hybrid/EV Battery Voltage External Isolation Warning

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Dashboard warning
Reduced vehicle power
Limitation of operation in electric mode
Possible shutdown of the high voltage system

Causes

Damage to the insulation of high-voltage wires
Moisture gets into the battery compartment
Mechanical damage to battery components
Contact corrosion
Defects in insulating materials

How to Fix

Carry out diagnostics of the high-voltage system
Check insulation resistance
Inspect the battery compartment for damage
Replace damaged insulating components
Repair only from an authorized dealer

Related codes

P0AA6 P0A7F P1A00