Following the fire, which killed 86 people and destroyed 14,000 homes, the company announced a charge of $ 10.5 billion against anticipated claims.
PG & E, which supplies electricity to some 16 million Californians, has been scrutinized for the way it maintains its infrastructure, as officials investigate the cause of the campfire.
About 15 minutes earlier, said the company, the nearby PG & E transmission line "was off". Later in the day, utility workers discovered that one party had separated from the PG & E tower.
Subsequent inspections of this transmission line have identified equipment that should have been repaired or replaced, the company said.
PG & E announced Thursday that it was inspecting its equipment in areas at higher forest fire risk, in order to avoid new incidents.
"The company is taking immediate action to address any issues that pose an immediate risk to public safety in anticipation of this year's forest fire season," he said.