Subject: CHECK ENGINE LIGHT AND A/T WARNING LIGHT ON WITH ONE OR MORE OF THESE DTCS (P0842, P0847, P0872, P0877, P0780, P1738) STORED IN TCM MEMORY	Bulletin No: 05-005/16
	Last Issued: 07/07/2016

 

BULLETIN NOTE

This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red beside the change bars.

Previously Issued TSBs:	Date(s) Issued
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

2012-2013 Mazda3 with SKYACTIV 6AT

2014-2016 Mazda3 with SKYACTIV 6AT (Japan built – VINS starting with JM1)

2014-2016 Mazda3 with SKYACTIV 6AT (Mexico built – VINS starting with 3MZ)

2013-2016 CX-5 with SKYACTIV 6AT

2014-2016 Mazda6 with SKYACTIV 6AT

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
• P0877:00 – Oil pressure switch No. 4 (oil pressure switch B) stuck on
• P0780:00 – Gear shifting malfunction
• P1738:00 Automatic transaxle internal malfunction

 

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
• 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 MS3 online instructions or Workshop Manual for proper diagnosis and repair procedure.

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

 

REPAIR PROCEDURE

1. Check for DTCs.
   • If any of the DTCs (P0842, P0847, P0872, P0877, P0780, P1738) is stored in TCM memory, go to step 3.
   • If any other DTCs are present or no DTCs are present, perform Workshop Manual troubleshooting.
2. If the vehicle is in the applicable VIN range listed below, proceed to TCM Reprogramming.” Otherwise, proceed to “Parts Replacement.”

2012-2013 Mazda3 JM1BL******500001 – 999999

2014-2016 Mazda3 JM1BM******100001 – 299999 (Japan built)

2014-2016 Mazda3 3MZBM******100001 – 199999 (Mexico built)

2014-2016 Mazda6 JM1GJ******100001 – 299999 (except Mexico spec)

2013-2016 CX-5 JM3KE******100001 – 599999 (except Mexico spec)

 

NOTE:

• If the concern has occurred with older TCM file, parts replacement is not necessary.
• If the concern has occurred with new TCM file, proceed to Parts Replacement.
• If the new TCM file for the vehicle is TBD, proceed to Parts Replacement.

 

TCM Reprogramming

1. Reboot the IDS to clear memory before reprogramming.
2. Using IDS 100.5 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.
• 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.

 

2. 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 MS3 online instructions or Workshop Manual section 01-02.
• After TCM reprogramming, it is no longer necessary to road test the vehicle to “relearn” KAM (Keep Alive Memory).

3. Perform “Initial Learning” according to the instructions on MS3 online or the Workshop Manual (section 0517 INITIAL LEARNING [FW6AEL, FWAX-EL])

 

Parts Replacement

NOTE:   Proceed with Parts Replacement only if concern re-occurs after TCM reprogramming for applicable vehicles.

1. Remove the oil pan from the transaxle according to the instructions on MS3 online or the Workshop Manual (section 05-17 CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6AEL, FWAX-EL]).
2. Remove the oil strainer (A) and the oil strainer O-rings (B) from the transaxle. F=Front of vehicle

 

2. Remove oil pressure switch A.

a. At oil pressure switch A, insert a precision flathead screwdriver (B) and move it in the direction of the arrow in the figure to disconnect the oil pressure switch A connector (C).

 

b. Remove the bolts for oil pressure switch A.

 

c. Detach the tab shown and remove oil pressure switch A from the control valve body.

1. Using an appropriate tool (such as a fastener remover), push the tab (A) of oil pressure switch A.

 

CAUTION:   If the tab is broken during removal, make sure to remove the broken pieces.

 

2. Pull out oil pressure switch A by shaking it.

CAUTION:    When removing oil pressure switch A, be careful not to damage the transaxle fluid temperature (TFT) sensor harness nearby.

4. Remove oil pressure switch B.

a. Insert a precision flathead screwdriver (A) and move it in the direction of the arrow as shown to discon-nect the oil pressure switch B connector.

 

b. Remove oil pressure switch B.

 

5. Install new oil pressure switches A and B.
6. Verify that the tab of each oil pressure switch (A and B) is attached correctly.
7. Install the bolts for oil pressure switches A and B.

Tightening torque: 9-10 N•m {92-101 khf•cm, 80-88 in•lbf}

 

8. Connect the oil pressure switch A and oil pressure switch B connectors.

 

9. Install the oil strainer with new oil strainer O-rings according to the instructions on MS3 online or the Workshop Manual (section 05-17 CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6AEL, FWAX-EL]).

NOTE: If there is a large amount of foreign material at the bottom of the oil pan, replace the oil strainer with a new one.

10. Install the oil pan according to the instructions on MS3 online or the Workshop Manual (section 05-17 CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6AEL, FWAX-EL]).

CAUTION:  Clean any remaining silicone sealant off the contact surfaces of the transaxle case and oil pan.

a. Apply a light coat of silicon sealant to the contact surfaces of the oil pan and transaxle case.

 

b. Install the oil pan with new bolts before the applied sealant starts to harden.

 

Tightening torque: 8-10 N•m {82-101 khf•cm, 71-88 in•lbf}

11. Install the removed parts.
12. Add ATF according to the instructions on MS3 online or the Workshop Manual (section 05-17 AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FW6A-EL] ).
13. Connect the negative battery cable.
14. Perform the Initial Learning Procedure. Refer to MS3 online instructions or Workshop Manual section 05-17.
15. Perform the Mechanical System Test. Refer to MS3 online instructions or Workshop Manual section 05-17.
16. Verify repair.

 

CALIBRATION INFORMATION

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)

 

2013 CX-5 (US spec)

TCM File Name	Drive	Kickdown Switch	Production Date Range
PEX3-21PS1 (*1)	2WD	without	Before March 31, 2013
PE02-21PS1-J			After March 31, 2013
PEX1-21PS1-A			Service part after August 1, 2013
PEY1-21PS1-A		with	Before March 31, 2013
PEAS-21PS1-C			After March 31, 2013
PEX3-21PS1 (*2)	4WD	without	Before March 31, 2013
PE1B-21PS1-J			After March 31, 2013
PEX2-21PS1-A			Service part after August 1, 2013
PEY2-21PS1-A		with	Before March 31, 2013
PEAT-21PS1-C			After March 31, 2013

 

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			After March 31, 2013
PYY0-21PS1-B	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

 

Mazda6 (US spec)

TCM File Name	i-ELOOP	Production Date Range
PYY3-21PS1-B	without	Before March 31, 2013
PY1E-21PS1-H		After March 31, 2013
PY1T-21PS1-C	with	—

 

2014-2015 Mazda3 (Mexico spec)

TCM File Name	Engine	VIN
PY8F-21PS1-B	PY (2.5L)	JM1 (Japan built)
PEGS-21PS1-A	PE (2.0L)	3MZ (Mexico built)
PEDE-21PS1-A

 

2013 CX-5 (Mexico spec)

TCM File Name	Engine	Drive
PE2T-21PS1-F	PE (2.0L)	2WD
PE2V-21PS1-F		4WD

 

2014-2015 CX-5 (Mexico spec)

TCM File Name	Engine	Drive	Production Date Range
PEZ7-21PS1-A	PE (2.0L)	2WD	Before March 31, 2013
PE2P-21PS1-E			After March 31, 2013
PEZ8-21PS1-A		4WD	Before March 31, 2013
PE2R-21PS1-E			After March 31, 2013
PYZ0-21PS1-B	PY (2.5L)	2WD	Before March 31, 2013
PY5L-21PS1-F			After March 31, 2013
PYZ1-21PS1-B		4WD	Before March 31, 2013
PY5M-21PS1-F			After March 31, 2013

 

Mazda6 (Mexico spec)

TCM File Name	Production Date Range
PYY7-21PS1-B	Before March 31, 2013
PY4K-21PS1-D	After March 31, 2013

 

PART(S) INFORMATION

Description	Qty.	Notes	Part Number
Switch A	1	—	FZ01-21-2C0
Swtich B	1	—	FZ01-21-2J0
Bolt	16	Replace part	9YA0-10-615A No products found.
O-ring	1	Replace part	FZ01-21-031
O-ring	1	Replace part	FZ01-21-032
Plug	1	Replace part	FU31-19-423
Drain Packing	1	Replace part	9956-41-400 Mazda oil drain plug washer set of 5 9956-41-400 Mazda quality Factory fitment OEM $12.00 Buy on Amazon Price incl. tax, excl. shipping Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API
Oil Strainer	1	Replace if needed. FZ01-21-031 and FZ01-21-032 (O-rings) are included with this part.	FZ01-21-500 No products found.

 

WARRANTY INFORMATION

NOTE:

• This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
• This repair will be covered under the following Warranty terms:
  • Oil pressure switch replacement – Powertrain Limited Warranty / CA PZEV Emission Warranty where applicable
  • TCM reprogramming – Federal Emission Warranty (long term) / CA PZEV Emission Warranty where applicable
  • For vehicles sold and registered in Mexico – New Vehicle Warranty
• Additional diagnostic time cannot be claimed for this repair.

	Oil Pressure Switch A and B Replacement	TCM Reprogramming (includes initial learning)
Warranty Type	A
Symptom Code	6X
Damage Code	9W
DTC	P0842, P0847, P0872, P0877, P0780, P1738
Part Number Main Cause	FZ01-21-2C0	5555-RP-TCM
Quantity	1	0
Operation Number / Labor Hours:	XXK43ARX / 1.8 Hrs.	XXK43CFX / 0.3 Hrs.

 

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05-005/16

https://www.nhtsa.gov/recalls?nhtsaId=10091809

https://www.nhtsa.gov/recalls?nhtsaId=10085422

https://static.nhtsa.gov/odi/tsbs/2016/SB-10085422-6903.pdf

 

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05-002/15

12/03/2015

https://www.nhtsa.gov/recalls?nhtsaId=10105656

https://static.nhtsa.gov/odi/tsbs/2015/SB-10105656-2532.pdf

 

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05-002/15

10/07/2015

https://www.nhtsa.gov/recalls?nhtsaId=10105523

https://static.nhtsa.gov/odi/tsbs/2015/SB-10105523-2532.pdf

 

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05-002/15

05/27/2015

https://www.nhtsa.gov/recalls?nhtsaId=10105432

https://static.nhtsa.gov/odi/tsbs/2015/SB-10105432-2532.pdf

 

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05-002/15

04/24/2015

https://www.nhtsa.gov/recalls?nhtsaId=10099801

https://static.nhtsa.gov/odi/tsbs/2015/SB-10099801-2532.pdf

 

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05-002/15

03/30/2015

https://www.nhtsa.gov/recalls?nhtsaId=10099684

https://static.nhtsa.gov/odi/tsbs/2015/SB-10099684-2532.pdf

 

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05-002/15

03/26/2015

https://www.nhtsa.gov/recalls?nhtsaId=10099685

https://static.nhtsa.gov/odi/tsbs/2015/SB-10099685-2532.pdf

 

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05-002/15

03/10/2015

https://www.nhtsa.gov/recalls?nhtsaId=10099692

https://static.nhtsa.gov/odi/tsbs/2015/SB-10099692-2532.pdf

 

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Mazda Reprogramming

Mazda Reprogramming

 

 

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MDSFA/MMP Required Hardware (Not Included)  

As shown in the diagram, an SAE J2534 pass-thru device is required to use the application.

 

Hardware validated by Mazda can be purchased separately from a third-party supplier. Validation has been done using the following J2534 pass-thru device and cables:

• CarDAQ+ (includes RS232 and Ethernet cables)

• Cable between CarDAQ and Vehicle – CD2534-J1962-FEPS (Sold separately / Required)

 

Important Information: Mazda makes no representations about the performance of third-party passthru devices. This pass-thru device list is provided voluntarily and as a courtesy. While our software meets SAE J2534, the pass-thru device manufacturer is responsible for making sure their pass-thru device operates properly on each Mazda vehicle and with Mazda software. We have listed the devices below because their manufacturers have attested that the tools have been validated to work. From time to time, we may test these devices. If we determine they do not operate properly or are obsolete, we may remove them from the list, without notice. Additionally, pass-thru devices listed here have been listed for their use with Mazda North American products only. While they may work with some European and other vehicles, they may not meet the requirements for those regions or operate properly.

 

Hardware can be purchased from a third-party supplier. Mazda has validated the following J2534 passthru devices:

 

**J2534 Pass-thru Device	Manufacturer
*CarDAQ+	Drew Technologies Inc.
*Pass-Thru+XS	Actia Corp.
*Snap-On Pass Thru Pro II	Snap-On.
*Universal Reprogrammer	EASE Diagnostics
*FLASH2 All-Makes Reprogrammer	CARDONE Industries
*Bosch Mastertech VCI	Bosch Diagnostics

*Contact the device manufacturer for the latest DLL and firmware versions.

**Many J2534 manufacturers sell and market similar J2534 devices with like names. Please exercise caution when using the list above for purposes of understanding devices Mazda has validated for use. J2534 Pass-thru Device Suppliers: Mazda has validated the J2534 devices listed on this page. Mazda does not plan to validate additional J2534 devices at this time.

 

PCM Reprogramming Process Overview 

• Purchase a subscription to PCM Reprogramming on this website.

• Download the application and install it on your PC.

• Connect the J2534 pass-thru device to the PC and the vehicle, and power it up.

• Run the application installed on your PC.

• The application will determine whether or not a new calibration file is available.

• If you choose to use the new file, the module will be reprogrammed.

• If PATS functionality is required, it can be chosen from the toolbox.

 

• Special Tools & Information

• As Built Data for all other Mazda Vehicles

• As Built Data for Truck, Tribute and 2003-2013 Mazda6

 

https://www.mazdaserviceinfo.com/pcm-reflashing

 

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Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API

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