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Mazda 3 Owners Manual: Vehicle Engine Control Unit Reset Procedure

Mazda 3 Owners Manual / Maintenance and Care / Owner Maintenance / Engine Oil / Vehicle Engine Control Unit Reset Procedure

NOTE This procedure is intended for vehicles with the engine oil flexible maintenance setting selected.

After replacing the engine oil, have a repair shop such as an Authorized Mazda Dealer perform the initialization (engine oil data resetting) of the recorded value. If the value recorded by the computer is not initialized, the wrench indicator light may not turn off or it may turn on earlier than normal.

NOTE The initialization (engine oil data resetting) of the recorded value can be performed using the following procedure:

  1. Switch the ignition OFF.
  2. Switch the ignition ON with the selector pressed, and press and hold the selector for about 5 seconds until the master warning light flashes.

Mazda 3. Vehicle Engine Control Unit Reset Procedure


  1. After the master warning light flashes for several seconds,
    the initialization is completed.
Recommended Oil
U.S.A., Canada, and Puerto Rico Use SAE 0W-20 engine oil. Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 0W-20 Oil is required to achieve optimum fuel economy. For maintenanc ...

Inspecting Engine Oil Level
Be sure the vehicle is on a level surface. Warm up the engine to normal operating temperature. Turn it off and wait at least 5 minutes for the oil to return to the oil pan. Pull out the ...

Other materials:

Wheel Unit ID Registration
NOTE: After the wheel unit replacement, registration of the wheel unit identification codes must be performed. ID registration can be done using the M-MDS, or not using the M-MDS. Using M-MDS 1. Connect the M-MDS to DLC-2. 2. After the vehicle is identified, select th ...

Steering SST
49 H032 301 Wrench 49 F017 1A0 Universal wrench 49 F032 303 Handle 49 B032 323 Rod seal remover body 49 N032 319A Support plate 49 ...

Temporary Spare Tire
Inspect the temporary spare tire at least monthly to make sure it is properly inflated and stored. NOTE The temporary spare tire condition gradually deteriorates even if it has not been used. The temporary spare tire is easier to handle because of its construction which is lighter and small ...

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