P2DB0Drive Motor A Temperature Sensor B Circuit Intermittent
- 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
- P2DB0 logs short dropouts or jumps in the sensor B signal that come and go too fast for the steady low and high checks. Because CARB requires circuit monitoring of input components to run continuously, such glitches are caught while driving. No manufacturer documents P2DB0, but Bentley's 2025 bulletin for the 2020–23 Bentayga and Flying Spur hybrids describes the same pattern on sensor A under P0A2E00: at high temperature the crimped joint of the motor temperature sensor shifts its resistance abruptly and the reading spikes. Only the sensor is renewed, yet engine and gearbox must come out to reach it. Heat cycling, vibration and loose terminals along the run from stator to inverter are the usual suspects. Expect a fault that is often heat-related and hard to reproduce on a cold car.
- What you may notice
- Warning light that comes and goes, often after hard driving
- Sensor B value spikes briefly in live data
- Electric drive power briefly limited on some models
- Likely causes
- LikelyResistance jumps in the sensor crimp at high temperature
- PossibleWorn or loose terminals in a connector of the sensor B line
- RareChafed lead with intermittent contact under vibration
- 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: €200 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.