Powertrain
generic / SAE
P2C88
Hybrid/EV Battery Voltage System Isolation Warning
The hybrid control module detects a system-wide isolation warning across multiple HV components. General insulation degradation.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / 88
Possible causes
- Multiple low-grade insulation faults high
- High ambient humidity affecting multiple components medium
- Pack cell imbalance approaching service threshold low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 500–5000 €
- Estimated time: 3–16 h
- Component: hv battery
- Component: hv wiring
- Component: isolation monitor
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012