U068CLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- A second inlet pressure sensor makes sense where each bank breathes through its own filter and charger, or where a two-stage system needs the pressure ahead of the second compressor. U068C means the digital frames from that sensor B no longer arrive in usable form. No manufacturer documents U068C publicly; Ford's 2023 diesel summary, the only examined table with an inlet pressure U code, runs just sensor A over SENT (U068B), and no GM table lists either code. Faults of an analog sensor B are P2374 to P2378. CARB lists compressor inlet pressure among the required diesel data. The controller then models the pressure on that side, so filter restriction there goes unseen and boost targets get more cautious.
- What you may notice
- Check engine light
- Filter restriction on that side no longer detected
- Slightly lower boost possible
- Likely causes
- LikelySignal, supply or ground wire to inlet sensor B damaged
- PossibleConnector loose or contaminated with oil
- PossibleSensor B electronics 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.