Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
MASTER WARNING LIGHT ON AND LACK OF POWER WITH DTC
P2BF6:00

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

APPLICABLE MODEL(S)/VINS
2019-2020 Mazda3 vehicles (Japan built) with VINS lower than JM1BP******163205 (produced before Jan.
11, 2020)
2019-2020 Mazda3 vehicles (Mexico built) with VINS lower than 3MZBP******131964 (produced before Jan.
11, 2020)
NOTE: Mexico spec. vehicles are not applicable as they are not equipped with Cylinder Deactivation.

DESCRIPTION
Some customers may experience the master warning light turning on and a lack of power with DTC
P2BF6:00 (Exhaust shutter valve position sensor circuit low input (1DC)) stored in memory. The PCM
software has been modified to avoid the unnecessary warning light illumination and power restriction with
no modification to the cylinder deactivation function.
Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE
1. Verify customer concern.
2. Reprogram the PCM using the Mazda Diagnostic And Repair Software (MDARS). Refer to "MDARS ECU Reprogramming Procedure".
NOTE:





If the current calibration file name in the ECU FILENAME screen is the same as shown in the
Calibration Files Information or with a later suffix, reprogramming is not necessary.
After reprogramming, pending DTC P2610:00 [PCM] will be stored without the Check Engine Light
ON. Start the engine and clear the DTC.
If DTC U2120:00 or/and U2500:82 are stored and i-ACTIVSENSE warning light (amber) turns on
after the reprogramming, refer to SA-036/19.

Page 1 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

3. Clear the DTC, turn the ignition off, and get out of the vehicle.
4. Close and lock the door.
5. Wait for at least ten minutes.
6. Verify the repair by starting the engine and making sure that all warning lights are off.
NOTE: If any DTC should remain after performing a DTC erase, diagnose the DTC according to the
instructions on MGSS.
MDARS ECU Reprogramming Procedure
NOTE: This procedure explains a generic reprogramming for all Electrical Control Units (ECU) such as
PCM, BCM, ESU, etc. Be aware that some sentences and screen images below mention a certain control
unit such as "PCM" or "BCM" as an example.
ATTENTION: READ ALL CAUTIONS AND NOTES BEFORE AND AFTER REPROGRAMMING!
CAUTION:







A poor connection between the vehicle and M-MDS and/or low voltage may result in
abnormal termination and/or data corruption. A low battery voltage may cause a
reprogramming failure resulting in unexpected ECU replacement.
Make sure that the following connections are firmly connected, then DO NOT touch the VCM
and DLC cable to prevent noise and a poor connection.
 Between the vehicle-side connector and the DLC cable
 Between the PC-side connector and the USB port of the PC
Connect an AC adaptor to the PC in order to minimize any voltage fluctuation during
reprogramming. DO NOT use the vehicle battery as a power source for the PC.
When reprogramming with MDARS, power consumption and voltage fluctuation are greater
than with IDS. Connect the GR8 battery charger and use Manual Mode set to 14.5 volts and
continous charging to the vehicle to minimize any voltage fluctuation. DO NOT use any
other charger.

Page 2 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

BEFORE REPROGRAMMING
NOTE:








Turn off all electrical loads, especially the A/C blower, audio system, rear defogger and headlights.
Perform a self-test and verify no DTCs are stored. If any DTCs are stored, repair the concern and
delete the DTCs.
Disconnect any aftermarket accessories (non-genuine Mazda accessories).
Terminate all programs other than MDARS on the PC. Running other programs may interfere with
the MDARS performance, resulting in the PC freezing or other problems.
Perform reprogramming with a proper internet connection. When using a wireless network, make
sure the connection is strong.
Make sure to keep enough free space on the PC’s hard disc. Insufficient free space (less than 1
GB) may result in the PC freezing during reprogramming.

1. Connect the M-MDS to the vehicle.
2. Launch the Mazda Diagnostic And Repair Software (MDARS).

Page 3 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

3. Turn the ignition on, then click “Start”.

4. Select the “toolbox” tab.

Page 4 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

5. Select Work Support group.

6. Select “Software update”, then click "Run".

Page 5 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

7. Select the ECU to be reprogrammed.

8. Confirm the current and new software versions, then click “Next”.
NOTE: When reprogramming the BCM, two softwares will be shown.

Page 6 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

9. Wait for the download, then click “Next”.
NOTE: When reprogramming the BCM, downloading will occur twice.

10. Read the screen instructions, then click “Next”.

Page 7 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

11. Follow the instructions on the screen, then click “Next”.

12. Wait for the reprogramming to complete.
NOTE:




The progress bar will stay at 90% for 30 seconds. This is not a failure.
When reprogramming the BCM, this process will occur twice.

Page 8 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

AFTER REPROGRAMMING
NOTE:



Select “Vehicle History” under “Collect Diagnostic Information”, then click “Run”.



Confirm the reprogramming on the screen and save the screen copy as a record.

Page 9 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc

Bulletin No.: 01-004/20

Last Issued: 02/25/2020

CALIBRATION INFORMATION
Japan built

TransDrive File Name
PCM
mission
PX58-188K2-K Mitsubishi
M/T 2WD
PX59-188K2-K Denso
PX05-188K2-L Mitsubishi
2WD
PX06-188K2-L Denso
A/T
PX07-188K2-N Mitsubishi
4WD
PX08-188K2-N Denso
Mexico built

PX13-188K2-F Mitsubishi
PX14-188K2-F Denso
PX15-188K2-F Mitsubishi
4WD
PX16-188K2-F Denso
2WD

A/T

WARRANTY INFORMATION
NOTE:





This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under Fed. Emission Warranty.
Additional diagnostic time cannot be claimed for this repair.

Warranty Type

A

Symptom Code

6X

Damage Code

9W

Part Number Main Cause

5555-18-881

Quantity

XXS1JXFX / 0.2 Hrs.

Operation Number / Labor
Hours:

XXS1JXFX / 0.2 Hrs.

Page 10 of 10
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2020 Mazda North American Operations, U.S.A.
02/26/2020 10:37 AM tlawrenc