Diagnostic procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT ATF LEVEL Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FW6A-EL] .) Is there any malfunction?	Yes	Adjust the ATF level to the specification, then go to the next step. (See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT [FW6A-EL] .)
1		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .)
2	VERIFY DTC TROUBLESHOOTING COMPLETED Perform the following procedure to ensure that the DTC has been resolved: Verify that the ATF temperature is 30 °C {86 °F} or more. Perform the following operation 20 times. Operate the selector lever from N to D position and wait for 5 s or more. Operate the selector lever from D to N position and wait for 5 s or more. Clear the DTC using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (FW6A-EL)] .) Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (FW6A-EL)] .) Is the DTC P2855:00 also present?	Yes	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .)
2		No	DTC troubleshooting completed.