Powertrain, generic (extended)

P2DB3 Drive Motor A Temperature Sensor C Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2DB3 sets when the sensor C voltage drops below its valid floor. For an NTC probe this would stand for a temperature far beyond any real winding heat, so a short is much more likely than a genuine hot spot: signal lead to ground or motor housing, insulation damaged inside the stator, or a thermistor shorted internally. Mitsubishi, which reads its W-phase coil probe as sensor 3 on the 2023 Outlander PHEV, uses its own code P3056 and the same floor as on the other phases: no more than 0.1 V over half a second. Thinking Electronic rates its stator probes for −40 to 200 °C and tests them at up to 2000 V AC, a reminder that the probe sits in the high-voltage winding. No manufacturer documents P2DB3. P2DB4 is the high side, P2DAE the same fault on sensor B.

Likely causes

Sensor C signal lead shorted to ground or motor housing
Probe insulation damaged inside the stator
Thermistor shorted internally

Symptoms

  • Hybrid system warning and check engine light
  • Sensor C reads extremely hot while the other sensors look normal
  • Electric drive power reduced

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–4,000
Time1–12 h

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

Parts involved

drive motor a temp sensor cwiring harnessinverter

Related codes

P2DB1P2DB2P2DB4P2DAEP0A2F

References: law.cornell.edu, mitsubishitechinfo.com, thinking.com.tw.