From Ross-Tech Wiki

16946/P0562/001378 - System Voltage: Too Low

Possible Causes

  • Wiring/Connectors from/to Control Module faulty
  • Power Supply (Battery/Generator) faulty

Possible Solutions

  • Check/Repair Wiring/Connectors from/to Control Module
  • Check Power Supply (Battery/Generator)

Special Notes

  • When found in an individual control module, it's most likely a local source (e.g. wiring/connectors).
  • When found in multiple control modules at the same time, it's most likely a common source (e.g. ground spot, battery, generator).
  • Intermittent codes are often stored during low outside temperature when the battery capacity goes down and may be ignored.
  • Common with 00532 - Supply Voltage B+: Signal too Low stored in other control modules.
  • When found in the 01-Engine controller in a RoW (Rest of World) market TDI VW Passat check TPI# 2022687.