Mazda 6 Service Manual: No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

No.19 excessive shift shock on torque converter clutch (tcc)

No.21 noise occurs at idle when vehicle is stopped in d, s, l ranges, or in r position

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Mazda 6 Service Manual: Foreword
When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL), HOLD indicator light flashing, and PCM memory for diagnostic trouble code (DTC), then diagnose the malfunction according to following flowchart. - If the DTC exists, diagnose the applicable ...

Mazda 6 Service Manual: Maintenance Monitor
1. Select the icon on the home screen to display the “Applications” screen. 2. Select “Vehicle Status Monitor” to display the current warnings. 3. Select “Maintenance” to display the maintenance list screen. 4. Switch the tab and select the setting item you want to change. You can ...