OBD Guide
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U068B

Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A

U068B is an OBD-II diagnostic trouble code meaning: Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A. Common causes: open or short circuit in the sensor circuit, turbocharger inlet pressure sensor malfunction. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Is On
  • The engine goes into emergency mode
  • Unstable idling

Causes

  • Open or short circuit in the sensor circuit
  • Turbocharger inlet pressure sensor malfunction
  • Poor contact in the sensor connector
  • Wiring harness damage
  • ECU malfunction (rare)

How to Fix

  1. Check the integrity of the sensor circuit (resistance, voltage)
  2. Inspect the sensor connector and contacts for corrosion or damage.
  3. Check the functionality of the pressure sensor
  4. Replace sensor if necessary
  5. Check ECU software for updates

Related codes

U0100U0121U0155

Error U068B by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U068B code mean?

U068B is an OBD-II diagnostic trouble code that indicates: Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A

What causes a U068B error code?

The most common causes of U068B include: Open or short circuit in the sensor circuit; Turbocharger inlet pressure sensor malfunction; Poor contact in the sensor connector; Wiring harness damage.

How do I fix a U068B diagnostic trouble code?

To fix U068B: Check the integrity of the sensor circuit (resistance, voltage). Inspect the sensor connector and contacts for corrosion or damage.. Check the functionality of the pressure sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U068B?

Limited driving only, diagnose soon

How much does it cost to fix U068B?

The estimated repair cost for U068B is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat