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: Specifications
Engine Electrical System *1 Q-85 is designed for i-ELOOP system. Only Q-85 should be used to ensure correct operation of i-ELOOP system. Consult an Authorized Mazda Dealer for details. *2 Not for i-ELOOP system. *3 This spark plug provides the SKYACTIV-G engine with optimum performance. Co ...

Mazda 6 Service Manual: Fuel injector inspection
Operation Test Carry out the Fuel Injector Operation Inspection. (See Fuel Injector Operation Inspection.) If not as specified, perform the further inspection for the fuel injectors. Resistance Inspection Note Perform the following test only when directed. 1. Turn the ignition s ...