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: On-board diagnostic test
DTCs Reading Procedure 1. Perform the necessary vehicle preparation and visual inspection. 2. Connect WDS or equivalent to the vehicle DLC-2 16-pin connector located as shown in the figure. 3. Retrieve DTCs by WDS or equivalent. Pending Trouble Code Access Procedure 1. Perform the necessary ...

Mazda 6 Service Manual: Fuel Gauge
The fuel gauge shows approximately how much fuel is remaining in the tank when the ignition is switched ON. We recommend keeping the tank over 1/4 full. If the fuel level is low, and turn an amber color. Refuel as soon as possible. Refer to Taking Action. NOTE After refueling, it m ...