Question

2001 chevy Silverado 1500 v8 5.3l, engine code p0440. What needs to be done?

Answer 1

Hi there

This code means the computer picked up a leak in the evap system. It can't tell which component has failed so it throws this code. The best method is to have a smoke test performed to locate the leak. You should always check the gas cap first. If it's loose it will set this code.