U068BLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- The inlet pressure sensor sits between air filter and compressor. Its reading shows filter restriction and, together with boost pressure, the pressure ratio the compressor works against. Ford's 2023 diesel summary connects sensor A via SENT and lists U068B in its SENT sensor group: U068B follows when the low-level SENT driver sees the signal line pinned to one voltage level, either up or down, monitored without pause and judged over 5 s. A sensor that still talks but raises its own error flag or reports data above a threshold sets P012A instead. Combined pressure and temperature chips such as Infineon's KP276 deliver this kind of SENT signal. U068C is the code for a second inlet sensor. Without the value the controller estimates inlet pressure, and boost or filter monitoring become less precise.
- What you may notice
- Check engine light
- Air filter restriction no longer monitored
- Possibly somewhat reduced boost
- Likely causes
- LikelySENT signal wire shorted to ground or voltage, or open
- PossibleConnector on the intake duct loose, oily or corroded
- PossibleInlet pressure sensor failed
- 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 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.