NHTSA ID Number: 10237199
Manufacturer Communication Number: 05-002-23
TSB/Document Date: 2023-06-04
Summary
Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738).
BULLETIN NOTES
This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red.
Previously Issued TSBs:
Date(s) Issued
05-001/21
05-003/20
05-004/19
05-004/18
05-005/16
09/03/21
07/09/20
05/20/19
04/16/18
07/07/16
05-002/15
12/03/15, 10/07/15, 05/27/15, 04/24/15, 03/30/15, 03/26/15
and 03/10/15
05-005/14
04/29/14, 04/09/14, 03/28/14, and 3/25/14
05-003/14
04/04/14 and 02/21/14
05-005/13
109/23/13, 9/25/13,12/16/13, and 12/17/13
APPLICABLE MODEL(S)/VINS
•
•
•
•
•
2012-2018 Mazda3 with SKYACTIV 6AT
2013-2021 CX-5 with SKYACTIV 6AT
2014-2021 Mazda6 with SKYACTIV 6AT
2016-2021 CX-3 with SKYACTIV 6AT
2016-2021 CX-9 with SKYACTIV 6AT
DESCRIPTION
Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of
these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738).
• P0842:00 - Oil pressure switch No. 1 (oil pressure switch B) stuck on
• P0847:00 - Oil pressure switch No. 2 (oil pressure switch A) stuck on
• P0872:00 - Oil pressure switch No. 3 (oil pressure switch A) stuck on
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• P0877:00 - Oil pressure switch No. 4 (oil pressure switch B) stuck on
• P0780:00 - Gear shifting malfunction
• P1738:00 Automatic transaxle internal malfunction
This is caused by the oil pressure switch A and/or B at the control valve body temporarily or permanently getting stuck
due to contamination entering the passage. To correct the problem, some mass production changes have been
implemented to reduce contamination and improve the DTC diagnostic logic.
NOTE: If the vehicle also has a delayed engagement concern, this TSB is not applicable. Refer to the instructions on
MGSS (SLOW ENGAGING AFTER OPERATING SELECTOR LEVER FROM N TO D POSITION [FW6A-EL/FW6AXEL]) or (SLOW ENGAGING AFTER OPERATING SELECTOR LEVER FROM N TO D POSITION [EW6A-EL/EW6AXEL]) for proper diagnosis and repair procedure.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Verify customer concern.
2. Check if one or more of the following DTCs is stored in the TCM memory.
P0729:00
6GR incorrect ratio
P0731:00
1GR incorrect ratio
P0732:00
2GR incorrect ratio
P0733:00
3GR incorrect ratio
P0734:00
4GR incorrect ratio
P0735:00
5GR incorrect ratio
P0736:00
Gear reverse incorrect ratio
• If any of these DTCs are stored, contact the Technical Hotline for the recommended repair, then proceed to TCM
programing to verify TCM has the latest calibration file.
• If none of these DTCs are stored, proceed to step 3.
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05/22/2023 11:37 AM tlawrenc
3. Proceed to either "TCM Reprogramming" or "Oil Pressure Switch Replacement" based on the chart
below.
Proceed to TCM
Reprogramming
Proceed to Oil Pressure Switch
Replacement
2012-2013 Mazda3 SKYACTIV
2016-2018 Mazda3
2014-2015 Mazda3
2016-2017, 2021 Mazda6
2014-2015 Mazda6
2016-2017 CX-5
2018-2020 Mazda6
2016-2021 CX-3
2013-2015, 2021 CX-5
2016-2019, 2021 CX-9
2018-2020 CX-5
2020 CX-9
NOTE:
• If the concern has occurred with an older TCM file, Oil Pressure Switch replacement is
not necessary.
• If the concern has occurred with the new TCM file, proceed to Oil Pressure Switch
Replacement.
TCM Reprogramming
1. Reboot the IDS to clear memory before reprogramming.
2. Using IDS 129.06 or later software, reprogram the TCM to the latest calibration (refer to “Calibration
Information” table) by following the “Module Reprogramming” procedure.
NOTE:
• Always update the IDS tool first, then follow on-screen instructions to download the
needed calibration file for TCM reprogramming.
• It is not necessary to remove any fuses or relays during TCM reprogramming when the
IDS screen prompts you to do so. You may accidentally stop power to one of the TCM
terminals and cause the TCM to be blanked, or you may receive error messages
during the IDS reprogramming procedure.
• IDS shows the calibration part numbers after programming the TCM.
• Please be aware that TCM 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.
• When reprogramming a TCM, 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/issue, it will also contain all previously released
calibrations.
• Start/Stop button vehicles only: DO NOT press the start/stop button during the
reprogramming process.
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05/22/2023 11:37 AM tlawrenc
• When performing this procedure, we recommend using the “Power Supply” mode in
the Battery Management System to keep the vehicle battery up to capacity. If a
different charger is used, make sure it does not exceed 20 AMPS. If it exceeds 20
AMPS, it could damage the VCM.
3. After performing the TCM reprogramming procedure, verify the repair by starting the engine and making
sure there is no Check Engine Light or abnormal warning lights present.
NOTE:
• If any DTCs should remain after performing DTC erase, diagnose the DTCs using
MGSS online.
• After TCM reprogramming, it is no longer necessary to road test the vehicle to “relearn”
KAM (Keep Alive Memory).
4. Perform “Initial Learning” according to the instructions on MGSS online (INITIAL LEARNING [FW6AEL,
FWAX-EL]).
NOTE: If the concern recurs during 10 seconds of idling with the selector lever in the P position and the
ATF temperature above 20°C {68°F}, proceed to “Oil Pressure Switch Replacement”.
5. Verify repair.
Oil Pressure Switch Replacement
NOTE:
• Proceed with Oil Pressure Switch Replacement only if the concern recurs after TCM reprogramming for applicable
vehicles.
• If the control valve body has been replaced with a new one, no further parts replacement is necessary.
1. Replace both the oil pressure switch A and B with new ones according to the instructions in MGSS (OIL
PRESSURE SWITCH REMOVAL/INSTALLATION [FW6A-EL]).
2. Verify repair.
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CALIBRATION
NOTE: TCM file name may not match to the production date range, especially if the valve body or ATX has ever been
replaced.
2012-2013 Mazda3
TCM File Name
Production Date Range
PEY0-21PS1-A
Before March 31, 2013
PE08-21PS1-N
After March 31, 2013
2014-2015 Mazda3 (US spec)
TCM File Name
Engine
i-ELOOP
VIN
PE5B-21PS1-D
PE (2.0L)
without
JM1 (Japan built)
PEDB-21PS1-B
with
PY2S-21PS1-D
PY (2.5L)
with
PEAR-21PS1-A
PE (2.0L)
without
3MZ (Mexico built)
Drive
Kickdown Switch
Production Date Range
2WD
without
Before March 31, 2013
2013 CX-5 (US spec)
TCM File Name
PEX3-21PS1 (*1)
PE02-21PS1-J
After March 31, 2013
PEX1-21PS1-A
Service part after August 1, 2
013
PEY1-21PS1-A
with
PEAS-21PS1-C
PEX3-21PS1 (*2)
Before March 31, 2013
After March 31, 2013
4WD
without
Before March 31, 2013
PE1B-21PS1-J
After March 31, 2013
PEX2-21PS1-A
Service part after August 1, 2
013
PEY2-21PS1-A
PEAT-21PS1-C
with
Before March 31, 2013
After March 31, 2013
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NOTE:
• (*1): Older version is PE02-21PS1-G.
• (*2): Older version is PE1B-21PS1-G.
2014-2015 CX-5 (US spec)
TCM File Name
Engine
Drive
Production Date Range
PEY5-21PS1-A
PE (2.0L)
2WD
Before March 31, 2013
PE1H-21PS1-D
After March 31, 2013
PEY6-21PS1-A
4WD
Before March 31, 2013
PE1K-21PS1-D
PYY0-21PS1-B
After March 31, 2013
PY (2.5L)
2WD
Before March 31, 2013
PY09-21PS1-H
After March 31, 2013
PYY1-21PS1-B
4WD
Before March 31, 2013
PY2W-21PS1-F
After March 31, 2013
2018-2019 CX-5 (US spec)
TCM File Name
Engine
Drive
SH9P-21PS1-E
2.2L Diesel
2WD
SH9T-21PS1-F
4WD
2018-2020 CX-5 (US spec)
TCM File Name
Engine
Drive
PYB1-21PS1-E
PX37-21PS1-D
PX39-21PS1-D
2.5L with cylinder deactivation
2WD
2WD
4WD
2.5L with turbo
2018-2021 CX-5 (US spec)
TCM File name
PYB2-21PS1-H
Engine
2.5L with cylinder deactivation
Drive
4WD
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TSB/Document ID: 05-002-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-05-17
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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