REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

UPDATED JANUARY 6, 2026 – TCM relearn not required for 2026MY
vehicles.
2024-2026 CX-90 and 2025-2026 CX-70
Engine Warning Light Illumination with DTC P0DAB
Table of Contents - Links in this document are provided for all steps below
Flowchart .................................................................................... Section A
Repair Procedure .......................................................................... Section B
Campaign Label Installation ........................................................... Section C
Vehicle Inspection Procedure and Preparation for Repair
1. Verify that the vehicle is within the following ranges and there is an OPEN MSP66
campaign in eMDCS:
SUBJECT VEHICLES
Model

Subject VIN range

2024-2026 MY JM3KK**** R1 100044 - 189861
CX-90 H3T
JM3KK**** S1 189862 - 261073
M Hybrid Boost JM3KK**** T1 350010 - 367752
2025-2026 MY
JM3KJ**** S1 100014 - 134448
CX-70 H3T
JM3KJ**** T1 200004 - 202573
M Hybrid Boost
The asterisk symbol “*” can be any letter or number.

Subject production date range
From December 27, 2022 through
November 17, 2025
From December 5, 2023 through
November 17, 2025

2. If the vehicle is in the range above and MSP66 is in OPEN status in eMDCS, proceed to
Step 2. If the vehicle does not have an OPEN MSP66 status, return the vehicle to the
customer or inventory.
3. Perform an eMDCS Warranty Vehicle Inquiry and inspect the vehicle for a Campaign
Label with MSP66 attached to the vehicle’s hood, driver door or firewall.
NOTE: Always be sure to verify the campaign number as the vehicle may have multiple
campaign labels on the hood, radiator support, and firewall or driver door jamb.

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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

eMDCS - Warranty Vehicle Inquiry Results
If eMDCS displays:

If no repair date is displayed on the line
with CAMPAIGN MSP66, the campaign
has not been completed on this vehicle

Campaign Label is:

Action to perform:

Present

Fill out Dealer Recall Help on
OneMazda contact or the Mazda
Warranty Department at
[email protected] to
review vehicle history.

Not present

Proceed to “REPAIR PROCEDURE”.

Present

Return vehicle to inventory or customer.

If repair date is displayed for CAMPAIGN
MSP66, is “CLOSED”

Not present

Complete a label and apply to vehicle’s
hood with repair date and dealer code
from eMDCS Warranty Inquiry.

CAMPAIGN MSP66 is not displayed

See Action

The vehicle is not affected by the MSP

TECHNICIAN LEVEL REQUIRED: CERTIFIED OR ABOVE (DOES NOT HAVE TO BE HYBRID
CERTIFIED). Note: Technician repairing needs to be Certified or above and does not need to be
Senior or Master as long as they have had the required training for ODR – Collection of
Diagnostic Information.
UPDATED: CAUTION PLEASE READ: If the vehicle arrives to your dealership with DTC
P0DAB, CLEAR THE CODE AND SEE IF IT RETURNS RIGHT AWAY. IF THE CODE
CLEARS PERFORM THE MSP66 REPROGRAMMING.
With the DTC P0DAB present, the code must be cleared first and confirmed no codes
in the system, then perform the software update. Perform a test drive and release the vehicle if the
code has not returned. If the code returns, please read the dealer email section “Alternate
Transportation Information” (inserted below) as the customer can continue to drive the vehicle
while the battery is on order. The warranty claim on the battery must be submitted separately
under normal warranty rather than the MSP.
Always check for an aftermarket device connected to the DLC port and remove before proceeding
with connection.
Alternative Transportation Information: Please refer to the parts and warranty information.
For vehicles experiencing MHEV battery failure associated with DTC P0DAB, dealers are
encouraged to explain to their customers to drive their vehicle while waiting for the
replacement battery to arrive. Please explain to the customer the following functions maybe
limited but does not affect the overall functionality of the vehicle, and it is still safe to drive.
• The engine warning light may illuminate
• The vehicle may be limited to engine-only operation due to fail-safe activation
o EV assist, i-stop and regeneration functions may be disabled
If the customer is uncomfortable with driving their vehicle, then please place them in a MCVP or other
form of alternative transportation.

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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

Section A: Flow Chart: NOTE: This Flow Chart needs to be followed strictly and the
CAUTION from page 2 must be read before proceeding
CX-90(KK), CX-70(KJ) - VIN affected by MSP66 – READ CAUTION on Page 2
MHB related DTCs other than P0DAB must be diagnosed first prior to performing this
repair, as ANY faulty 48 Volt MHEV battery for ANY related DTC needs to be addressed
and repaired prior to MSP66. If P0DAB is present, clear DTC and check if DTC returns.
If DTC immediately returns, a 48-Volt battery is required, DO NOT perform MSP66
and read “Alternate Transportation” in the Dealer Email & page 2.
Is DTC P0DAB present?
YES

NO – PERFORM MSP66

Clear the DTC code and check if the
failure returns right away. If no DTC,
then update the software, test drive
and release the vehicle if the code
does not return. If DTC returns,
follow
steps
for
“Alternate
Transportation” in the Dealer Email
& on page 2. If DTC returns do not
perform MSP66.

Reprogram or check for current level of the following ECUs by
MDARS:
NOTE: Reprogram each ECU individually (As it doesn't reprogram
all ECUs with one click)
• PCM
• MHB in MDARS display - BECM (Battery Energy Control
Module)
NOTE: If the TCM is automatically reprogrammed when the PCM
is reprogrammed, then “Perform TCM initial learning”

Check/Upload ODR data

Perform TCM initial learning – only perform if TCM update appears in MDARS.
NOTE: If TCM update does not appear, continue with repair steps - Do not
perform TCM relearn for 2026MY vehicles

Perform DTC inspection

Repair completed
----------END OF SECTION A----------

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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

Section B: Repair Procedure
Reprogram ECUs by MDARS and follow all steps as required.

https://s3.us-east-1.amazonaws.com/tsd.mazdausa.com/MDARS/MDARS_ECU_
REPROGRAMMING_ PROCEDURE.pdf
1.

Check the file version of each ECU listed in the countermeasure repair procedure. Compare the
software version of each ECU with the software version in the repair procedure.
a. If the vehicle software version is newer, do not perform reprogramming.
b. If the vehicle software version is older, perform reprogramming.

Sample

PCM ( Powertrain Control Module )
Hardware part number : PYFA-18881Software part number : PYFC-188K2-

No DTCs

2.

Select target ECU to be reprogrammed.
• Required module
- PCM
- MHB
NOTE: One Package Reprogramming
MDARS automatically selects other ECUs related to the ECU to be reprogrammed. The
selected ECUs may be reprogrammed together.
Make sure that the ECU to be reprogrammed listed in the countermeasure repair
procedure is displayed in MDARS.

ECU Reprogramming

-

If the ECU related to the one-pack reprogramming is not displayed in MDARS, reprogram
the ECU that is displayed first.
Check the software version of the ECU that has not been reprogrammed and reprogram
that ECU if it is an older version.
Depending on the TCM software version, TCM reprogramming may not be necessary.

NOTE: If the target ECU is not found, return to the Quick Check screen and click the refresh
button. If the target ECU is not displayed in the Quick Check screen, start a new MDARS
session, and try again.
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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66
3.

Confirm the current and new software versions, click “Next”. CX-90 Example shown. If the
software is at the current level, do not stop repairing and continue with all remaining steps
including Uploading ODR data and Campaign Label Installation.

4.

Wait for the download and click “Next”.

5.

After completion of software update, the previous and current software version are shown.
- Check current version at ‘’Calibration File information below’’.
- Then, click on “Finish” to exit the ECU reprogramming.

CX-90 Example

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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

Calibration file information
Note: If the calibration file is with the suffix in the table or later, unit is already modified. TCM
Relearn is not required for 2026MY vehicles
Calibration file information
Model

Module
MHB

CX-90
PCM

MHB
CX-70
PCM

Target ECU
(Hardware #)
K628-67ZBZK629-67ZBZH301-18881H301-18881H301-18881H301-18881K628-67ZBZK629-67ZBZH301-18881H301-18881H301-18881H301-18881-

Target
Software file #

Reprogramming
Time (min.)

K628-67ZH2-J

3

H333-188K2-D
H334-188K2-D
H301-188K2-V
H302-188K2-V

3 (Without TCM) or
8 (With TCM)

K628-67ZH2-J

3

H335-188K2-C
H336-188K2-C
H327-188K2-K
H328-188K2-K

3

3
3 (Without TCM) or
8 (With TCM)

Upload ODR Data - Go to Mandatory Post-Reprogramming Section in link
6.

Disconnect battery charger before going to next step.

TCM Initial Learning after TCM reprogramming (if TCM does not appear in
MDARS it does not need updated and re-learn not required but continue with
all repair steps. TCM Relearn is not required for 2026MY vehicles)
TCM Initial learning
CAUTION: If the VIN is affected by other campaigns besides MSP66 which also require ‘TCM Initial
Learning after TCM reprogramming’, please only perform this MSP once all other campaigns have been
completed (ECU software reprogramming for other campaigns has been completed).

DTC inspection – Go to Mandatory Post-Reprogramming Section in link
Note: On the test vehicle Hybrid System Malfunction appeared on screen
without DTC. Cycled key and message disappeared
1. Check and erase DTC by using MDARS.
2. Confirm all DTCs were erased.
NOTE:
If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the
appropriate troubleshooting section of the Workshop Manual.
3.

Disconnect the MDARS from the DLC-2.

Explanation to customers as provided in the repair link
----------END OF SECTION B, PROCEED TO SECTION C.----------

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REPAIR PROCEDURE
MAZDA SERVICE PROGRAM MSP66

C. Campaign Label Installation
1. Fill out a Black “Campaign Label” (9999-95-055A-06) with Campaign #: “MSP66”,
your dealer code, and the repair date. It is OK to bundle multiple campaigns on
one label as long as each campaign is legible as Mazda vehicles may have more
than 1 campaign. Use more than one label if necessary.

2. Affix it to the hood as shown. If you cannot place the label here, the radiator
support, firewall or driver door jamb are acceptable locations:

END OF REPAIR PROCEDURE

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