Test Notes

NOTE: You should enter this Pinpoint Test only when directed here.

REMEMBER
This Pinpoint Test is intended to diagnose the following:
- Exhaust system pipes (front and rear).
- Exhaust system muffler and tail-pipe assembly.
- Catalytic converter.
- Exhaust manifold.
- Harness circuits: Downstream Heated Oxygen Sensors (HO2S).

DESCRIPTION
For additional information on the Catalyst Efficiency Monitor, refer to Description and Operation / On Board Diagnostic System Monitor.

For additional information on Exhaust Systems, refer to Emission Control Systems / Catalytic Converter / Description and Operation, Catalytic Converter.