P2DB5Drive Motor A Temperature Sensor C 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
- P2DB5 is set when the sensor C signal drops out or jumps briefly and then recovers – a flickering contact rather than a lasting open or short. No manufacturer documents P2DB5. The closest published case concerns sensor A: Bentley's P0A2E00 bulletin for 2020–23 Bentayga and Flying Spur hybrids traces temperature jumps to a sensor crimp whose resistance changes suddenly when hot, cured by a new sensor rather than a new motor. CARB expects circuit checks on input components to run without pause, which is why even short glitches end up in memory. The warning may disappear for days; testing the harness while the drive unit is warm helps to catch it.
- What you may notice
- Warning light that disappears and returns
- Brief spikes or gaps in the sensor C value in live data
- Fault mainly after long or hard drives
- Likely causes
- LikelyCrimp of sensor C changing resistance when hot
- PossibleLoose or fretted terminals in the sensor C connector
- RareLead rubbing through and touching intermittently
- 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.