U068C code meaning
Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor B
Network system Generic code U06xx codes Check engine light
What U068C means
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.
U068C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U068C
- Check engine light
- Filter restriction on that side no longer detected
- Slightly lower boost possible
Common causes of U068C
- Most likelySignal, supply or ground wire to inlet sensor B damaged
- PossibleConnector loose or contaminated with oil
- PossibleSensor B electronics failed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo inlet pressure sensor bVehicle bus wiring
What each part of U068C means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8C | The exact fault in that area. |
What to do next
- Note U068C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U068C
What does U068C mean?
U068C means "Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor B". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U068C?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U068C fail an emissions test?
Yes, it can. U068C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U068C to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U068C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.