P0DA9Hybrid/EV Battery Voltage/Drive Motor B Inverter Voltage Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0DA9 is the motor B counterpart of P0DA8: the controller compares traction battery voltage with the voltage seen at the inverter of drive motor B, typically the rear motor, and logs the code when the two drift apart with the contactors closed. No manufacturer documents P0DA9 publicly. Denso describes the underlying test, a battery sensor and an inverter sensor checked against a permitted difference, in the background of patent US9819293B2. Mitsubishi runs a closely related check on the 2023 Outlander PHEV but compares the rear inverter with the capacitor voltages of its power electronics and reports it as P0DA4 at 100 V for 0.2 s. A mismatch may come from either sensor, from a contactor or cable with high resistance, or from the inverter itself. CARB requires hybrid systems to monitor electric motor performance.
- What you may notice
- MIL and hybrid system warning
- Rear electric drive limited or disabled
- Likely causes
- PossibleVoltage sensing in the motor B inverter drifting
- PossibleBattery pack voltage measurement in the battery management faulty
- RareHigh resistance in a contactor, fuse or cable between battery and rear inverter
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.