P2DB4Drive Motor A Temperature Sensor C Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2DB4 is the open-circuit side of sensor C: the voltage climbs toward the reference because hardly any current still flows through the thermistor. A broken wire, a terminal backed out of the motor connector, corrosion or a cracked thermistor are the likely finds; a short to a supply voltage is rarer. With an NTC the value shown would be an impossibly cold winding. For the W-phase probe of the same Mitsubishi (sensor 3, own code P3055) the limit is likewise 4.93 V held half a second with at least 8 V at the power drive unit, and the repair path ends with a new power drive unit or front motor. The UAES patent places the upper limit just below supply voltage. No manufacturer documents P2DB4 itself. P2DB3 is the low side, P2DAF the same fault on sensor B.
- What you may notice
- Hybrid system warning and check engine light
- Sensor C reads far below ambient temperature in live data
- Electric drive power limited
- Likely causes
- LikelyOpen signal or ground lead of sensor C
- PossibleTerminal backed out or corroded in the motor connector
- PossibleThermistor open inside the stator
- RareSignal lead shorted to a supply voltage
- 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 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.