OBD Guide
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P0045

Turbocharger/Supercharger Boost Control A Circuit/Open

P0045 is an OBD-II diagnostic trouble code meaning: Turbocharger/Supercharger Boost Control A Circuit/Open. Common causes: broken wiring to the turbine actuator, boost actuator malfunction. Estimated repair cost: $17–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–278 (est.)

Symptoms

  • Significant reduction in engine power
  • Check Engine Light Is On
  • Increased fuel consumption
  • Unstable idling
  • Black or white smoke from the exhaust pipe
  • Whistling sounds from the turbine

Causes

  • Broken wiring to the turbine actuator
  • Boost actuator malfunction
  • Damage to connectors in the control circuit
  • Short circuit in wiring
  • Engine control unit malfunction
  • Mechanical jamming of the actuator
  • Contact corrosion

How to Fix

  1. Read error codes with a diagnostic scanner
  2. Check the integrity of the wiring to the turbine actuator
  3. Inspect connectors for corrosion and damage
  4. Measure the actuator resistance with a multimeter
  5. Check the supply voltage in the control circuit
  6. If necessary, replace damaged wiring
  7. Replace faulty turbine actuator
  8. Clear error codes and test drive
  9. Recheck the system with a scanner

Related codes

P0046P0047P0048P0299P0234

Error P0045 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0045 code mean?

P0045 is an OBD-II diagnostic trouble code that indicates: Turbocharger/Supercharger Boost Control A Circuit/Open

What causes a P0045 error code?

The most common causes of P0045 include: Broken wiring to the turbine actuator; Boost actuator malfunction; Damage to connectors in the control circuit; Short circuit in wiring.

How do I fix a P0045 diagnostic trouble code?

To fix P0045: Read error codes with a diagnostic scanner. Check the integrity of the wiring to the turbine actuator. Inspect connectors for corrosion and damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0045?

Limited driving only, diagnose soon

How much does it cost to fix P0045?

The estimated repair cost for P0045 is $17–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat