LOS ANGELES — At the height of the clergy sex-abuse scandal in 2002, Catholic leaders stayed silent as California lawmakers passed a landmark bill that gave hundreds of accusers extra time to file civil lawsuits. The consequences were costly.

California dioceses paid $1.2 billion in settlements and released thousands of confidential documents that showed their leaders, including Cardinal Roger M. Mahony of Los Angeles, made plans to shield admitted molesters from law enforcement.

Now, state legislators are considering a bill that would give some alleged victims more time to sue. But this time, the church is waging a pitched battle in Sacramento to quash it.

A group affiliated with the church has hired five lobbying firms and spent tens of thousands of dollars fighting SB 131. Opponents argue the bill unfairly opens the church, the Boy Scouts and other private and nonprofit employers to lawsuits over decades-old allegations that are tough to fight in court. At least two bishops have visited the Capitol to argue their case to the bill’s chief author.