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2019 Leaf SV Plus - Charging stops randomly, error message

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Mike T. · rep 0 · May 25, 1:55 AM · 1 replies · solved · Question

Vehicle: 2019 Nissan Leaf SV Plus

My 2019 Nissan Leaf SV Plus has started having issues with charging. Whether I use my Level 2 charger at home or a public DC fast charger, it often stops charging prematurely and displays a "Charging System Error" message on the dashboard. Sometimes it charges fine, other times it's a real pain, interrupting charging after only a few minutes.

I've tried different chargers and cables, but the problem persists. What could be causing this? Is it a common issue with the Leaf's charging port or something more serious with the battery management system?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:55 AM

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ClearTheCode admin answer:

Intermittent charging interruptions and "Charging System Error" messages in your 2019 Nissan Leaf SV Plus can be frustrating and point to several potential issues within the EV's complex electrical system. Here's a look at common causes:

  1. Charging Port (EVSE Inlet) Issue: The physical charging port on the vehicle can develop problems due to wear, corrosion, or internal damage. This can lead to poor communication with the charger or intermittent connections, causing charging to stop. Inspect the port for any visible damage or debris.
  2. Onboard Charger (OBC) Malfunction: The onboard charger, which converts AC power from Level 1/2 chargers into DC power for the battery, can fail. If it's intermittently malfunctioning, it will trigger errors and stop charging.
  3. Battery Management System (BMS) Error: The BMS monitors the health, temperature, and voltage of the individual battery cells. If it detects an anomaly (e.g., a cell imbalance, temperature outside optimal range), it can halt charging to protect the battery. This is a critical system.
  4. High Voltage (HV) System Sensor Faults: Various sensors monitor the HV system's integrity. A fault in one of these sensors (e.g., insulation resistance sensor, voltage sensor) can cause the system to shut down charging as a safety measure.
  5. Software Glitch: Less commonly, a software bug in the vehicle's charging control module can cause these issues. A reflash or update might be necessary.

When to see a shop: Given that this involves the high-voltage system of an EV, it is crucial to have your Leaf diagnosed by a certified EV technician at a Nissan dealership. They have specialized training and equipment to safely work on and diagnose EV high-voltage systems. Attempting DIY repairs on HV components is extremely dangerous. They can:

  • Read specific EV fault codes (e.g., P0AA6: Hybrid Battery Voltage System Isolation Fault, P0D22: DC Charging System Fault, P0D2F: Charging Communication Error).
  • Perform advanced diagnostics on the charging port, onboard charger, and BMS.
  • Check for and apply any relevant software updates for the vehicle's charging system.
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