OBD Guide
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P0046

Turbocharger/Supercharger Boost Control A Circuit Range/Performance

P0046 is an OBD-II diagnostic trouble code meaning: Turbocharger/Supercharger Boost Control A Circuit Range/Performance. Common causes: turbocharger actuator malfunction, damage to the boost pressure sensor. Estimated repair cost: $167–889.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–889 (est.)

Symptoms

  • Loss of engine power
  • Black or white smoke from the exhaust pipe
  • Unusual sounds when the turbocharger is operating
  • Increased fuel consumption
  • Unstable engine idling
  • Activating emergency engine operation

Causes

  • Turbocharger actuator malfunction
  • Damage to the boost pressure sensor
  • Open or short circuit in the electrical circuit
  • Clogged or damaged vacuum lines
  • Seizing of variable geometry turbine blades
  • Engine ECU malfunction
  • Mechanical damage to the turbocharger

How to Fix

  1. Connect a diagnostic scanner and read additional error codes
  2. Check the electrical connections and wiring harnesses of the turbine control circuit
  3. Test the boost pressure sensor and its circuit
  4. Check the operation of the turbocharger actuator
  5. Inspect vacuum lines for damage
  6. Check the mechanical condition of the turbocharger
  7. If necessary, replace faulty components
  8. Clear error codes and test drive

Related codes

P0045P0047P0048P0299P0234P0235

Error P0046 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0046 code mean?

P0046 is an OBD-II diagnostic trouble code that indicates: Turbocharger/Supercharger Boost Control A Circuit Range/Performance

What causes a P0046 error code?

The most common causes of P0046 include: Turbocharger actuator malfunction; Damage to the boost pressure sensor; Open or short circuit in the electrical circuit; Clogged or damaged vacuum lines.

How do I fix a P0046 diagnostic trouble code?

To fix P0046: Connect a diagnostic scanner and read additional error codes. Check the electrical connections and wiring harnesses of the turbine control circuit. Test the boost pressure sensor and its circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0046?

Limited driving only, diagnose soon

How much does it cost to fix P0046?

The estimated repair cost for P0046 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat