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Test Procedure

Prior to repair work, perform a preliminary check to verify the condition. Refer to PRELIMINARY CHECK .

-- Perform the function test in Diagnostic Mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If the specified values are exceeded:

-- Check the exhaust system for leaks.

-- Repair as necessary.

If no leaks are found in the exhaust system, no O2 sensor codes set and DTC P0420 is set:

-- Replace the catalytic converter. Refer to the service information for removal and installation procedures.

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