NHTSA ID Number: 11026921
Manufacturer Communication Number: MSP Warranty
TSB/Document Date: 2026-01-04
Summary
Subject: Mazda
Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email.
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TSB/Document ID: MSP Warranty
Replacement Service Bulletin Number:
MFR Communication Date: 2025-12-17
MFR Internal Campaign ID/Software Version: MSP66
Communication Type: Service Campaign
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
WARRANTY INFORMATION
MAZDA SERVICE PROGRAM MSP66
DECEMBER 17, 2025 – WARRANTY CLAIMS CAN NOW BE SUBMITTED.
TEMPLATES WILL BE POSTED BY FRIDAY DECEMBER 19, 2025 OR BEFORE.
2024-2026 CX-90 and 2025-2026 CX-70
Engine Warning Light Illumination with DTC P0DAB
CONDITION OF CONCERN
On certain subject vehicles, the engine warning light may illuminate, and the vehicle may be limited
to engine-only operation due to activation of the fail-safe mode. Motor assist, i-stop and motor
regenerative functions may be disabled, although the vehicle is safe to drive. The DTC P0DAB (Cell
voltage variation malfunction) may be stored.
Causal factor: Improper software in the Powertrain Control Module (PCM) and - MHB in MDARS
display - BECM (Battery Energy Control Module).
OUTLINE OF REPAIR
Reprogram the PCM and MHB with the Mazda Modular Diagnostic System (M-MDS), using
Mazda Diagnostic And Repair Software (MDARS).
Note: The TCM may or may not be reprogrammed, please see below for the claim type
depending on whether the TCM was programmed or not programmed.
SUBJECT VEHICLES
Model
2024-2026 MY
CX-90 H3T
M Hybrid Boost
2025-2026 MY
CX-70 H3T
M Hybrid Boost
Subject VIN range
Subject production date range
JM3KK**** R1 100044 - 189861
JM3KK**** S1 189862 - 261073
JM3KK**** T1 350010 - 367752
From December 27, 2022 through
November 17, 2025
JM3KJ**** S1 100014 - 134448
JM3KJ**** T1 200004 - 202573
From December 5, 2023 through
November 17, 2025
- The asterisk symbol “*” can be any letter or number.
OWNER NOTIFICATION
No owner notification is required, but an explanation about the purpose (or outline) of repair and
customer’s agreement are required before starting the repair.
PARTS INFORMATION – There are no parts required for MSP66.
Page 1 of 2
WARRANTY INFORMATION
MAZDA SERVICE PROGRAM MSP66
WARRANTY CLAIM PROCESSING INFORMATION
- This repair will be covered under Mazda’s Powertrain Limited Warranty.
- Additional diagnostic time cannot be claimed for this repair.
- Warranty pre-authorization is required if the vehicle is outside the Mazda’s Powertrain Limited
Warranty.
ALL VEHICLES - USE ONLY IF THE TCM IS REPROGRAMMED:
PCM and MHB reprogramming
(with TCM reprogramming and initial learning)
Process Number
AS033A
Symptom Code
99
Damage Code
Causal Part Number & Qty
Labor Operation Code and Hours
99
7777-SP-Z55 & 0
1AS33AFX & 0.8 hrs.
ALL VEHICLES – USE ONLY IF THE TCM IS NOT REPROGRAMMED:
PCM and MHB reprogramming
(without TCM initial learning)
Process Number
Symptom Code
Damage Code
Causal Part Number & Qty
Labor Operation Code and Hours
Note:
AS033A
99
99
7777-SP-Z55 & 0
1AS33BFX & 0.5 hrs.
There is no Rental car program for this MSP. Please utilize MCVP, Uber, Lyft or other
options under Mazda’s Powertrain Limited Warranty.
Page 2 of 2
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