1. Remove the muffler.
2. Visually inspect the muffler.

Is there a restriction in the muffler?

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Go to Step 2

Go to Step 3

Replace the muffler. Refer to Muffler Replacement

Does the vehicle still have a loss of power and/or internal rattles?

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Go to Step 3

System OK

Inspect the catalytic converter.

Is the honeycomb broken in the catalytic converter?

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Go to Step 4

System OK

Replace the catalytic converter. For the three-way catalytic converter, refer to Catalytic Converter Replacement

For the oxidation catalytic converter, refer to Oxidation Catalytic Converter Replacement .

Does the vehicle still have a loss of power and/or internal rattles?

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System OK