P0A2B on 2024-2025 Mazda CX-90 — Drive Motor "A" Temperature Sensor Circuit Range/Performance
1 vehicles · 1 makes
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Mazda CX-90 · 2024–2025
On 3.3 Turbo / Turbo S mild-hybrid (MHEV) CX-90s, one or more of the 12 cells in the 48-volt MHEV battery can become voltage-imbalanced, storing DTC P0DAB (cell voltage variation). The vehicle illuminates the engine malfunction warning, drops to an engine-only fail-safe mode, and disables M Hybrid Boost, i-stop, and regenerative braking; CX-90 forum owners report dealers calling the car unsafe to drive. This 48V MHEV battery fault is distinct from the inverter/PCM software loss-of-power recalls (7024J / 24V815 / 24V817).
Common Symptoms
- Engine malfunction / warning light illuminated
- Loss of motor assist (M Hybrid Boost) and weaker acceleration
- i-stop and regenerative braking stop working
- Dealer warns the vehicle could lose power
- Limp / fail-safe engine-only mode
How to Fix
This is handled as a Mazda technical service / warranty (MSP) matter, not the software recalls: when DTC P0DAB is confirmed, the 48-volt MHEV battery is replaced under warranty per Mazda's MHEV battery service procedure (NHTSA TSB document MC-11016241). NOTE: do NOT conflate this with Safety Recall 7024J (NHTSA 24V816) or 24V815/24V817, which are inverter/PCM/ECM software reflashes for separate loss-of-power DTCs (e.g., P0A2B) and do not address P0DAB cell imbalance.
Sources for this issue (3)
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P0A2B code reference
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Frequently asked questions
What does P0A2B mean?
P0A2B stands for "Drive Motor "A" Temperature Sensor Circuit Range/Performance." The drive motor 'A' temperature sensor signal is implausible or out of expected range for operating conditions.
What are the most common causes of P0A2B?
The most common causes of P0A2B are: Drifting/aging temperature sensor, High-resistance connection, Cooling system issue, Control module fault. The specific cause varies by vehicle.
How much does it cost to fix P0A2B?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0A2B?
Au7o has documented P0A2B across 1 vehicle models from 1 manufacturers: Mazda.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.