P2EBBCrankcase Temperature Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2EBB is the general circuit fault of a sensor that reports the temperature inside the crankcase, i.e. of the blow-by gas or the space above the oil. Patents show what engines do with it: Ford (US9228557) feeds exhaust-heated air into the crankcase, checks the arrival with such a sensor and stores a code, possibly with MIL, if the reading stays below the expected value; GM (US5897597) diagnoses the ventilation by the temperature rise of the gas between fresh-air inlet and PCV valve. CARB 13 CCR 1968.2 (e)(9) requires the crankcase ventilation to be monitored, so a dead sensor can block that check. No manufacturer documents P2EBB publicly. The code fits signal loss or intermittent contact; out-of-range faults are P2EBE and P2EBD.
- What you may notice
- Check engine lamp on
- Crankcase temperature missing or jumping in live data
- No noticeable change in how the engine runs
- Likely causes
- LikelyConnector loose or contaminated with engine oil
- PossibleHarness wire breaking intermittently on the engine block
- PossibleSensor element failed internally
- 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: €50 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.