2012 Dodge Journey brakes problems

Engine light multiple times- emissions control - found online but did not receive a recall: in affected cars, fca will replace the catalytic converter and update software for the powertrain control module — that is, your car’s primary drivetrain computer. Fca will recycle the old catalytic converter to remove the precious metals common in such devices, a usual practice. “obviously the catalytic converter, that’s the biggest part of this,” chernoby said.

Brake pedal goes completely to the floor when braking. Happens intermittently, brakes work perfectly fine for 2 to 3 weeks then occurs again. Has happened 4 times. Completely replaced brake fluid, checked brake pump and brake line for leaks, no leakage visible. Can it be brake module or ABS module that is defective? Vehicle was in motion everytime situation occurred on the highway.