Title: Diagnose emission and driveability concerns caused by the catalytic converter system; determine needed action.
Course: Automotive Technology III (20104-III) > Section: Engine Performance: Emissions Control Systems Diagnosis and Repair

Procedure should include

- using the scan tool and performing a temperature test or using a five-gas analyzer to test efficiency
- using manifold vacuum readings
- referring to service materials and manufacturer guidelines.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VIII. Engine Performance
E. Emissions Control Systems Diagnosis and Repair
Task 5

Process/Skill Questions:

- What is the chemical makeup of the catalyst?
- What does the catalytic converter do?
- How is waveform different on the pre- and post-catalytic converter O_2 sensors?