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

Other materials:

Mazda 6 Service Manual: Close Proximity Warning
If your vehicle rapidly closes in on the vehicle ahead because the vehicle applies the brakes suddenly while you are traveling in headway control, the warning sound activates and the brake warning is indicated in the display. Always verify the safety of the surrounding area and depress the bra ...

Mazda 6 Service Manual: Oil control valve (ocv) removal/installation
L3 1. Disconnect the negative battery cable. 2. Remove the plug hole plate. 3. Remove the high-tension lead. (See HIGH-TENSION LEAD REMOVAL/INSTALLATION.) 4. Remove the oil control valve (OCV) connector. 5. Remove the ventilation hose. 6. Remove the cylinder head cover. (See Cylinder Head Co ...