Understanding the Meaning of “EV System Service Needed”

The "EV System Service Needed" is a message displayed on your vehicle dashboard indicating the presence of one or more diagnostic issue codes. While it does not necessarily mean a severe problem, professional help is required to interpret the codes and troubleshoot. Should your vehicle break down in the process, here is a guide on transporting it: Towing and Hoisting Your Mitsubishi Outlander PHEV.

Highlighting Common EV Issues and Their Solutions

The 12V battery, though small, plays a crucial role in running the system and its accessories. Reduced voltage (around 10V) may result in the illumination of various warning lights on the dashboard, preventing the car from entering READY mode. This happens when the 12V battery is old or has been used without the vehicle being in READY mode. For example, on a cold morning, a driver might run the heater without having the car in READY mode, the 12V battery isn't charging, merely staying in ACC mode. This can drain the battery, making it unable to start the vehicle. A Mitsubishi dealer can help interpret fault code P0562, which indicates a low battery voltage.

Details about the 12V Battery:

  • Brand: Yuasa
  • Voltage: 12 Volts
  • Technology: AGM
  • Capacity (C20): 45 Ah
  • CCA (EN): 325 A
  • The charging current for the 12V battery should be 4.2 A or less, taking around 9 hours for a full charge with 4.2 A constant current charging. In case of a flat battery, jump-starting is an option. View the guide for this process here: How to Jump Start Your Mitsubishi Outlander PHEV

    Tyres play a significant role - mismatched brands, sizes, or models can trigger the "EV System Service Required" message due to inconsistent axle wheel speed. This discrepancy can also affect regenerative braking and the ABS system, producing vibrations detectable on the brake pedal. It's therefore crucial, as per Mitsubishi recommendations, to use identical tyres for your vehicle to function optimally.

    Potential issues with the A/C aircon compressor can emerge if inappropriate gas or oil is used, or an incorrect UV dye is applied – this can damage the compressor coil, leading to short-circuiting. Read more about this and potential solutions here: Troubleshooting for Mitsubishi Outlander PHEV Aircon Problems

    The PTC heater is an electric unit that can overheat and cause damage if the coolant isn't flowing properly. To understand more about this and how to troubleshoot, visit: Resolving Mitsubishi Outlander PHEV PTC Heater Problems

    Navigating Challenges with Fast, Rapid Chargers

    Fast chargers might present challenges such as system faults. Over time, problems may develop with the switch handle, resulting in the charger staying on even after unplugging before completing the charge. Some chargers might work differently – they may need you to signal the completion of charging before unplugging. Faults might also surface due to a defective charging cable or a wrongly inserted pin in the socket.

    This article only scratches the surface as the potential reasons for the "EV System Service Required" message are numerous. For a precise diagnosis, it is recommended to consult a professional who is trained in handling these systems.


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