Mazda 6 Service Manual: No.22 no engine braking in hold mode

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

No.23 transaxle overheats

Other materials:

Mazda 6 Service Manual: Outside Temperature Display (Without Multi-information Display)
When the ignition is switched ON, the outside temperature is displayed. NOTE Under the following conditions, the outside temperature display may differ from the actual outside temperature depending on the surroundings and vehicle conditions: Significantly cold or hot temperatures. Sudden ...

Mazda 6 Service Manual: Dtc table
DTCs are common for present and past malfunction diagnosis. Note When DTCs not shown in the DTC table are displayed, replace the SAS unit. If the air bag system warning light does not illuminate or remains illuminated when the ignition switch is turned to ON position, i ...