Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
Bulletin No.: 01-003/20

CHECK ENGINE LIGHT ON WITH DTCs P24C6:00, P24AE:00,
P24B1:00 AND/OR P24AF:00

Last Issued: 02/13/2020

APPLICABLE MODEL(S)/VINS
2018-2019 CX-5 SKYACTIV-D 2.2

DESCRIPTION
Some customers may experience a check engine light illumination with DTCs P24C6:00, P24AE:00,
P24B1:00 and/or P24AF:00 stored in PCM memory.






P24C6:00 - PM sensor: internal temperature sensor malfunction (1DC DTC)
P24AE:00 - PM sensor control circuit range/performance problem (1DC DTC)
P24B1:00 - PM sensor circuit high input (1DC DTC)
P24AF:00 - PM sensor circuit range/performance (2DC DTC)

[Particulate Matter (PM) Sensor]
DTCs may be caused by the following:




DTC P24C6:00: May be caused by water condensation in the exhaust system which may
accumulate on the PM sensor element and result in cracks.
DTCs P24AE:00, P24B1:00, P24AF:00: May also be caused by water condensation in the exhaust
system which may accumulate on the PM sensor element and result in an incorrect output signal.

To eliminate these DTCs, the following improvements have been made:





The PM sensor has been improved (DTC P24C6:00).
The mounting orientation of the PM sensor has been changed to reduce water accumulation (DTCs
P24AE:00, P24B1:00, P24AF:00).
The detection condition of DTCs P24AE:00 and P24B1:00 has been changed to 2DC, which will no
longer detect a temporary incorrect sensor output.

Customers having this concern should have their vehicle repaired using the following repair procedure.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

REPAIR PROCEDURE
1. Verify the customer concern.
2. If DTCs P24C6:00, P24AE:00, P24B1:00 and/or P24AF:00 are stored in memory, use the table below to
determine which repair(s) are applicable to the subject vehicle.

MY
20182019
2019

VIN Range
Production Date Range
Repair
JM3 KF**** **382622 - Mar. 23, 2018 - Feb. 22, PM sensor replacement and DCU
583243
2019
reprogramming
JM3 KF**** ** 647477 PM sensor re-installation and DCU
Jun. 3, 2019 - Jul. 3, 2019
665227
reprogramming

[Dosing Control Unit (DCU)]
- If DTC P24AF:00 is the only DTC stored, perform step 3.
- If DTC P24C6:00 is the only DTC stored, replace the PM sensor with the modified one according to MGSS
online (PM SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 ]), then perform step 4. NOTE: When
installing the PM sensor, follow "PROPER ORIENTATION OF PARTICULATE MATTER (PM) SENSOR"
below.
- If DTCs P24AE:00 and/or P24B1:00 are stored, reprogram the DCU according to "REPROGRAMMING
DOSING CONTROL UNIT (DCU)" below, then perform step 3.
3. Clear the DTC(s) and perform the compulsory diesel particulate filter regeneration according to the
instructions on MGSS online (COMPULSORY DIESEL PARTICULATE FILTER REGENERATION
[SKYACTIV-D 2.2]).
- If the same DTC(s) return after performing the compulsory diesel particulate filter regeneration, replace the
PM sensor with the modified one according to MGSS online (PM SENSOR REMOVAL/INSTALLATION
[SKYACTIV-D 2.2]), then perform step 4. NOTE: When installing the PM sensor, follow "PROPER
ORIENTATION OF PARTICULATE MATTER (PM) SENSOR" below.
- If the same DTC(s) are not stored after performing the compulsory diesel particulate filter regeneration,
remove the PM sensor and re-install it according to "PROPER ORIENTATION OF PARTICULATE
MATTER (PM) SENSOR" below, then perform step 4.

DTC
Reprogram Dosing Control Unit (DCU)

P24C6:00 P24AE:00 and/or P24B1:00 P24AF:00
X
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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

Diesel Particulate Filter Regeneration
Replace Particulate Matter (PM) sensor
Re-install Particulate Matter (PM) sensor
Warranty Type

X
(wa)

X
X
(wb)

X
(wc)

X
X
X
(wd) (we)

4. Verify repair according to the instructions on MGSS online "PURPOSE: VERIFICATION OF VEHICLE
REPAIR COMPLETION".
REPROGRAMMING DOSING CONTROL UNIT (DCU):
ATTENTION: READ ALL CAUTIONS AND NOTES BEFORE AND AFTER REPROGRAMMING DCU!
CAUTION:
• IF IDS DOES NOT HAVE SUFFICIENT BATTERY POWER, THE REPROGRAMMING WILL FAIL.
• DCU DAMAGE MAY OCCUR IF THE CORRECT BATTERY CHARGER SETTING IS NOT USED.
• SET THE BATTERY MANAGEMENT SYSTEM TO "POWER SUPPLY MODE" DURING DCU
REPROGRAMMING.
• POWER SUPPLY MODE will maintain proper battery voltages during DCU reprogramming.
• If a different charger is used, MAKE SURE IT DOES NOT EXCEED 20 AMPS. IF IT EXCEEDS 20
AMPS, IT COULD DAMAGE THE DCU.
• The charger MUST be connected directly to the vehicle battery.
• It is NOT necessary to remove any fuses or relays during DCU reprogramming when the IDS screen
prompts you to do so. You may accidentally stop power to one of the DCU terminals and CAUSE THE DCU
TO BE BLANKED, or you may receive error messages during the IDS reprogramming procedure.
• Start/Stop button vehicles: DO NOT press the start/stop button during the reprogramming process.
BEFORE REPROGRAMMING DCU:
NOTE:
• DCU is shown as SCRCU in M-MDS.
• Verify the current DCU file name in the vehicle by log view screen. If it's the same as shown in
thecalibrationchart(s) below (or a later one), you do not need to reprogram the DCU.
• Always update the IDS tool first, then follow on-screen instructions to download the needed calibration file
for DCU reprogramming.
• If the vehicle exhibits any trouble codes or driveability symptoms, diagnose and repair using MGSS
BEFORE attempting to reprogram the DCU.
• When reprogramming a DCU, IDS will always display the “latest” calibration P/N available for that vehicle.
If any calibration has been revised/updated to contain new information for a new service concern, it will also
contain all previously released calibrations.
• Confirm the DLC cable is in good condition before attempting to reprogram the DCU.
DCU REPROGRAMMING:
1. Reboot the IDS to clear memory before reprogramming.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

2. Using the latest IDS Software available, reprogram the DCU to the latest calibration (refer to “Calibration
Information” table) by following the “Module Reprogramming” procedure.
3. Verify the file name matches with the Calibration chart(s) below.
4. Clear all DTCs.
5. Start the engine and confirm that no warning lights stay on.
6. Record the customers radio presets from the infotainment system.
7. Disconnect the negative battery cable and wait at least 30 seconds to reset the fuel control learning data.
8. Re-connect the negative battery cable.
9. Re-enter the customers presets into the infotainment system.
AFTER REPROGRAMMING DCU:
NOTE:
• IDS shows the calibration part numbers after programming the DCU.
• If any DTCs should remain after performing DTC erase, diagnose the DTCs using MGSS online
instructions and submit a warranty claim according to the normal warranty procedure.
• Be aware that DCU calibration part numbers and file names listed in any Service Bulletin may change due
to future releases of IDS software, and additional revisions made to those calibrations for service related
concerns.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

PROPER ORIENTATION OF PARTICULATE MATTER (PM) SENSOR:
NOTE: To reduce water accumulation in the PM sensor, follow the steps below when installing the sensor
so the sensor element faces upward.
1. Find the matrix barcode (2) on the PM sensor (1) that faces the same direction as the sensor element
(See “Location of matrix barcode” below).
2. Mark (3) the sensor body 180 degrees opposite of the matrix barcode and harness side of the free nut.
3. Install the PM sensor so that the marking faces downward to the ground (5) +/- 30 degrees (4).
NOTE: When tightening the free nut, the sensor housing may turn together. For the best result, temporarily
tighten the nut holding the sensor housing at 15 degrees before the target angle, then tighten to the
specified torque.



Tightening torque: 30-44 ft·lbf {40-60 N·m, 4.1-6.1 kgf·m}

1
2

PM sensor
Matrix barcode
Marking
3
(Within +/- 30 degree)
4
+/- 30 degree
5
Ground

Location of the PM sensor:

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

2WD

4WD

Location of the matrix barcode:
Locate the sensor element plate (1) and imagine the dashed line as shown below. The matrix barcode (2) is
printed at the crossing of the line and either side of the sensor housing.

NOTE: If the matrix barcode is not found, it may be hidden under the free nut. This may be due to a
variation in manufacturing.
Use the following procedures to locate it the matrix barcode.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

Procedure (A) Looking from the sensor element side:
1) Locate the sensor element plate.
2) Push the free nut downward.
3) Hold the nut to create clearance, then inspect the area shown below by the arrow.

Procedure (B) Looking from the harness side:
1) Locate the sensor element plate.
2) Push the free nut upward.
3) Hold the nut to create clearance, then inspect the area shown below by the arrow.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

CALIBRATION INFORMATION
SCRCU file name in log viewer.

Spec. File Name
2WD SH9P-187K2-N
AWD SH9T-187K2-N

PARTS INFORMATION
Part Number

Description

Qty.

Notes
Parts kit includes a modified PM sensor (SH9P-18-641B),
SHYF-18-7E0 Parts Kit, (Modified) 1
replacement bands and clips

NOTE: If the modified parts kit listed in the table above is not available, an older parts kit (SHY6-18-7E0A)
may be ok to use for this repair. Follow the
sensor inspection instructions below to determine if the older kit can be used for this repair or not.

1. Inspect the ID Number (shown below) on the PM sensor from kit SH9P-18-641A.
2. Is the ID Number 0281007918/919 or greater?
- If No, the kit cannot be used in this repair.
- If Yes, the kit can be used in this repair.

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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Last Issued: 02/13/2020

WARRANTY INFORMATION
NOTE:
• This warranty information applies only to verified customer complaints on vehicles eligible for warranty
repair.
• This repair will be covered under California Emission Warranty (Short)
• Additional diagnostic time cannot be claimed for this repair.

(wa) Part replacement only (when only DTC P24C6:00 is stored in memory)
Warranty Type Code
A
Symptom Code
6X
Damage Code
9W
Part Number Main Cause
SHYF-18-7E0 or SHY6-18-7E0A
Quantity
1
Labor Operation Number
XXR82ARX
1.1 Hrs. (2WD)
Labor Hours
0.6 Hrs.(4WD)
(wb) DCU reprogramming and part replacement after compulsory diesel particulate filter regeneration
Warranty Type Code
A
Symptom Code
6X
Damage Code
9W
Part Number Main Cause
SHYF-18-7E0 or SHY6-18-7E0A
Quantity
1
Labor Operation Number
XXR82BRX
1.4 Hrs. (2WD)
Labor Hours
0.9 Hrs. (4WD)
(wc) DCU reprogramming and part re-installation after compulsory diesel particulate filter regeneration
Warranty Type Code
A
Symptom Code
6X
Damage Code
9W
Part Number Main Cause
SHYF-18-7E0 or SHY6-18-7E0A
Quantity
0
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.
02/13/2020 11:10 AM tlawrenc

Bulletin No.: 01-003/20

Labor Operation Number
Labor Hours

Last Issued: 02/13/2020

XXR82CFX
1.4 Hrs. (2WD)
0.6 Hrs. (4WD)

(wd) Part replacement after compulsory diesel particulate filter regeneration
Warranty Type Code
A
Symptom Code
6X
Damage Code
9W
Part Number Main Cause
SHYF-18-7E0 or SHY6-18-7E0A
Quantity
1
Labor Operation Number
XXR82DRX
1.3 Hrs. (2WD)
Labor Hours
0.8 Hrs. (4WD)
(we) Part re-installation after compulsory diesel particulate filter regeneration
Warranty Type Code
A
Symptom Code
6X
Damage Code
9W
Part Number Main Cause
SHYF-18-7E0 or SHY6-18-7E0A
Quantity
0
Labor Operation Number
XXR82EAX
1.3 Hrs. (2WD)
Labor Hours
0.5 Hrs. (4WD)

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.
02/13/2020 11:10 AM tlawrenc