Powertrain, generic · Hybrid propulsion

P0DA9 Hybrid/EV Battery Voltage/Drive Motor B Inverter Voltage Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Voltage sensing in the motor B inverter drifting
Battery pack voltage measurement in the battery management faulty
High resistance in a contactor, fuse or cable between battery and rear inverter

Symptoms

  • MIL and hybrid system warning
  • Rear electric drive limited or disabled

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–5,000
Time0.5–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery voltage sensordrive motor b inverter voltage sensorhybrid control module

Related codes

P0DA8P0DA4P0DA3

References: law.cornell.edu, patents.google.com, mitsubishitechinfo.com.