P2D8EEngine Oil Pressure Sensor/Switch C Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Some engines have more than one oil pressure sensor or switch; which one is labelled A, B or C is up to the manufacturer. P2D8E is the general circuit code for sensor or switch C: the controller sees an electrical fault, or with a digital SENT sensor a message or internal error, that it cannot classify as too low or too high. No manufacturer documents P2D8E publicly; Audi's EA888 evo5 does use a sensor C, but only its low fault P2D8F appears in a bulletin. The matching checks for sensor A are published: Ford's 2024 engines report an internal or communication fault of a SENT pressure sensor as P0520 within 5 s, and GM tests a plain switch while the engine has been stopped for a long time, setting P0520 as a Type C code without lamp if it still shows pressure for 5 s. Low and high are P2D8F/P2D90.
- What you may notice
- Malfunction indicator lamp, depending on make
- Oil pressure warning may come on without real pressure loss
- Switchable oil pump may stay in its safe high-pressure stage
- Likely causes
- LikelyOil-soaked, corroded or loose connector at sensor C
- PossibleInternal electronics fault of the sensor or switch
- PossibleChafed or broken wire between sensor and engine control unit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.