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dtr_078
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Rivian · Trucks & SUVs
Front Motor Inverter Fault
Quick Answer
Error code DTR_078 on your Rivian Trucks & SUVs means: Front Motor Inverter Fault. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
R1S-2024R1S-ADV-2024R1S-PERF-2024R1T-2024R1T-ADV-2024R1T-PERF-2024R2-2025R3-2025
Likely Causes
  1. Inverter thermal runaway from continuous high-current demand
  2. Faulty power MOSFETs or capacitors in inverter
  3. Water intrusion or condensation in inverter enclosure
  4. High-voltage connector corrosion at motor terminals
  5. Inverter firmware corruption or communication loss
How to Fix It
1
Stop driving immediately and pull over safely
2
Allow inverter to cool; do not attempt to restart for several minutes
3
Connect to Rivian diagnostic scanner to read fault details
4
Check all HV connections at front motor for looseness or corrosion
5
Schedule service for inverter replacement or firmware reprogramming
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Front Motor Inverter Assembly
High-Voltage Connectors
Thermal Interface Material
Related Error Codes
DTR_001DTR_012DTR_023DTR_034DTR_045
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