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"Charge Fault" Error and Very Slow Charging on 2022 R1T

0

Mike T. · rep 0 · May 25, 5:12 AM · 1 replies · solved · Question

Vehicle: 2022 Rivian R1T Launch Edition

I'm experiencing a recurring "Charge Fault" message on my 2022 Rivian R1T Launch Edition. This happens both at home on my Level 2 charger and sometimes at public DC fast chargers. When it doesn't fault, the charging speed is significantly slower than usual, often taking twice as long to gain a decent charge.

I've checked the charging cables and tried different outlets, but the issue persists. Could this be an internal vehicle problem rather than the charger itself?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 5:12 AM

0
  1. Identify the Source: The "Charge Fault" message can originate from the vehicle, the charging station, or the cable. Since it happens with multiple chargers, it points more towards the vehicle.
  2. Common Vehicle-Side Causes:
    • Onboard Charger (OBC) Malfunction: The OBC converts AC power from Level 2 chargers to DC for the battery. A fault here can prevent or slow charging.
    • Battery Management System (BMS) Communication Issues: The BMS monitors battery health and communicates with the charger. Any disruption can trigger a fault.
    • Charging Port Issues: Physical damage, corrosion, or a loose connection within the vehicle's charging port can cause intermittent faults.
    • High Voltage System Faults: Broader issues within the high-voltage battery system can manifest as charging problems.
  3. Diagnostic Codes: Professional diagnosis is crucial. A Rivian service center can read specific diagnostic trouble codes (DTCs) related to the charging system. Look for:
    • P0Dxx: Codes specifically related to the charging system (e.g., P0D01 - Charge Connector Interlock Circuit Low).
    • P0Axx / P0Bxx: High voltage battery system codes.
    • U0xxx: Communication errors between modules (e.g., U0111 - Lost Communication with Battery Energy Control Module).
  4. Troubleshooting Steps (User):
    • Ensure the charging cable is fully inserted and locked into the vehicle's port.
    • Try a different charging cable if possible.
    • Perform a vehicle soft reset (refer to your owner's manual).
  5. When to See a Shop: A recurring "Charge Fault" is a critical issue that requires immediate attention from Rivian Service. Driving with a compromised charging system could lead to further damage or leave you stranded. They have the specialized tools to diagnose the OBC, BMS, and high-voltage system components safely and accurately.
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