OBD Guide
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P0084

Exhaust Valve Control Solenoid Circuit Bank 2

P0084 is an OBD-II diagnostic trouble code meaning: Exhaust Valve Control Solenoid Circuit Bank 2. Common causes: exhaust valve control solenoid malfunction, broken or damaged wiring to the solenoid. Estimated repair cost: $33–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–278 (est.)

Symptoms

  • Check Engine Light Illuminates
  • Reduced engine power
  • Unstable idling
  • Increased fuel consumption
  • Rough engine operation
  • Difficulty starting the engine
  • Activating emergency engine operation

Causes

  • Exhaust valve control solenoid malfunction
  • Broken or damaged wiring to the solenoid
  • Short circuit in solenoid circuit
  • Oxidation or corrosion of connectors
  • Solenoid contaminated with engine oil or carbon deposits
  • Engine control module (ECM) malfunction
  • Low engine oil pressure
  • Using the wrong engine oil

How to Fix

  1. Connect a diagnostic scanner and read all error codes
  2. Check the level and condition of the engine oil
  3. Visually inspect the solenoid wiring and connectors for damage.
  4. Measure the resistance of the exhaust valve control solenoid (usually 6-30 ohms)
  5. Check the power at the solenoid connector (usually 12V)
  6. Clean connectors from oxidation and corrosion
  7. Replace exhaust valve control solenoid if necessary
  8. Check and, if necessary, repair damaged wiring
  9. Clear error codes and test drive
  10. Recheck the system with a diagnostic scanner

Related codes

P0083P0085P0086P0087P0088P0020P0021

Error P0084 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0084 code mean?

P0084 is an OBD-II diagnostic trouble code that indicates: Exhaust Valve Control Solenoid Circuit Bank 2

What causes a P0084 error code?

The most common causes of P0084 include: Exhaust valve control solenoid malfunction; Broken or damaged wiring to the solenoid; Short circuit in solenoid circuit; Oxidation or corrosion of connectors.

How do I fix a P0084 diagnostic trouble code?

To fix P0084: Connect a diagnostic scanner and read all error codes. Check the level and condition of the engine oil. Visually inspect the solenoid wiring and connectors for damage.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0084?

Limited driving only, diagnose soon

How much does it cost to fix P0084?

The estimated repair cost for P0084 is $33–278. Actual cost depends on your vehicle, location, and labor rates.

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