What is the reason for the restricted fault in Song Plus-DMI-EV?
2 Answers
Song Plus-DMI-EV restricted fault may be caused by the battery or battery control system, such as inconsistency of a certain battery, loose fuse or wiring, or control module issues. Song PLUS is a new compact SUV under BYD, positioned between Song Pro and Tang in the future, offering consumers a variety of powertrain options. BYD Brand History: BYD Company Limited was founded in 1995, starting with a team of over 20 people. By 2003, it had grown into the world's second-largest rechargeable battery manufacturer and established BYD Auto in the same year. Within just one year, BYD Auto expanded its product line from the single "Flyer" microcar to a full range of products including A-class fuel vehicles, C-class fuel sedans, lithium-ion electric vehicles, and hybrid vehicles. BYD Brand Introduction: BYD Auto follows a development path of independent research, independent production, and independent branding, committed to creating truly affordable and high-quality vehicles for the people. The product designs incorporate advanced international trends while aligning with the aesthetic concepts of Chinese culture.
Yesterday I encountered the 'EV Restricted' warning on my Song Plus DM-i and immediately pulled over to restart the system. This issue often occurs during the hybrid-to-pure-electric transition, primarily due to erratic behavior in the power battery management system. It could be triggered by excessive voltage differences within the battery pack activating protection mode, or clogged cooling passages causing temperature spikes. Last time at the dealership, they traced it to oxidized high-voltage wiring harness connectors causing excessive contact resistance and false alarms. Recommendation: Stay calm—first try turning off AC and headlights before rebooting the infotainment system. If the warning persists, test battery health status and use a multimeter to check if DC bus voltage drops below 340V. 90% of such faults require dealership intervention for software updates or module replacements—never force-drive to avoid damaging the motor controller.
