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TuningBot DTC Database · v4.37.14

U068B Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A

Generic (OBD-II) interpretation in the TuningBot DTC database.

U · NetworkEngineOBD2

What U068B means

U068B
Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A Generic · engine Data confidence 65%

The control module stopped receiving expected network messages from the Turbocharger/Supercharger Inlet Pressure Sensor A node on the vehicle communication bus.

Symptoms

  • Possible reduced power or limp mode
  • MIL illuminated
  • Possible abnormal turbocharger noise

Possible causes

  • Turbocharger actuator or position sensor fault
  • Sticking variable geometry mechanism
  • Charge-air or vacuum leak
  • Wiring or connector fault

Recommended checks

  • Compare specified vs actual boost with live data
  • Check actuator movement over the full range
  • Check hoses and vacuum lines
  • Inspect wiring and connectors

Related and nearby codes

How to read U068B

U

Network: communication between control units.

0

Generic SAE-standard code: same meaning on every make.

68B

Specific fault index within the subsystem.

Frequently asked questions about U068B

What does U068B mean?

Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A. The control module stopped receiving expected network messages from the Turbocharger/Supercharger Inlet Pressure Sensor A node on the vehicle communication bus.

Is U068B generic or manufacturer-specific?

U068B is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U068B at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U068B is removable in your case.

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