Code result
P2C88
Hybrid/EV Battery Voltage System Isolation Warning
High severity
What it means
The hybrid control module detects a system-wide isolation warning across multiple HV components. General insulation degradation.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Multiple low-grade insulation faults
highOne of the most commonly reported causes for this code — check this first.
High ambient humidity affecting multiple components
mediumA plausible cause — test and verify before replacing parts.
Pack cell imbalance approaching service threshold
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2C88 freeNo credit card required