⚠️ Tata EV Error Codes Database
OBD-II DTCs and Tata-specific fault codes. Access via diagnostic scanner or service center.
| Code | System | Description | Causes | Action | Severity |
|---|
⚡ High Voltage Safety Guidelines
⚠️ CRITICAL HIGH VOLTAGE WARNING
Tata EVs operate at 300-400V DC. Fatal injury can result from improper handling. Only trained technicians should work on HV systems.
🔴 HV Isolation Fault (P0AA6)
Most common HV issue. BMS detects low isolation resistance between HV bus and chassis.
- AC Compressor: #1 culprit - internal short
- Coolant Ingress: Moisture in battery pack
- PTC Heater: Heating element breakdown
- Damaged HV Cables: Road debris, rodents
🔧 Diagnosis Procedure
1Disconnect AC Compressor first (most common)
2If P0AA6 clears → Compressor is culprit
3Then test PTC Heater, OBC in sequence
4Megger test confirms insulation breakdown
🔋 Battery Safety
LFP chemistry has flat voltage curve. SOC can drop from 20% to 0% suddenly if one cell reaches voltage cliff.
- Monthly calibration cycle recommended
- Deep discharge to <10%, charge to 100%
- Leave plugged 2-4 hours for passive balancing
📞 Emergency Contacts
| Tata RSA (24/7) | 1800-209-8989 |
| Tata Service | 1800-209-7979 |
| ZConnect App | In-app SOS |
🔄 Tata EV Maintenance Schedule
Tata enforces 6 months/7,500 km intervals. EVs are 20-30% heavier than ICE equivalents, accelerating suspension wear on Indian roads. HV insulation integrity monitoring is critical.
| Item | Interval | Type | Cost | Notes |
|---|