OBD Guide
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P0079

Exhaust Valve Control Solenoid Circuit Low Bank 1

P0079 is an OBD-II diagnostic trouble code meaning: Exhaust Valve Control Solenoid Circuit Low Bank 1. Common causes: faulty exhaust valve control solenoid, open or short circuit in solenoid wiring. Estimated repair cost: $22–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Difficulty starting the engine
  • Rough engine operation when accelerating
  • Increased toxicity of exhaust gases

Causes

  • Faulty exhaust valve control solenoid
  • Open or short circuit in solenoid wiring
  • Oxidized or damaged connectors
  • Low voltage in the on-board network
  • Engine control unit (ECU) malfunction
  • Bad ground in solenoid circuit
  • Corrosion of solenoid connector contacts

How to Fix

  1. Connect a diagnostic scanner and read all error codes
  2. Check the vehicle's on-board voltage
  3. Visually inspect the solenoid wiring for damage.
  4. Check the resistance of the exhaust valve control solenoid
  5. Measure the voltage at the solenoid connector with the engine running.
  6. Check the integrity of the wiring from the ECU to the solenoid
  7. Clean the contacts of the solenoid connector from oxidation
  8. If necessary, replace the faulty solenoid
  9. Check the quality of the mass connection
  10. Clear error codes and test drive

Related codes

P0078P007AP007BP0080P0081P0082

Error P0079 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0079 code mean?

P0079 is an OBD-II diagnostic trouble code that indicates: Exhaust Valve Control Solenoid Circuit Low Bank 1

What causes a P0079 error code?

The most common causes of P0079 include: Faulty exhaust valve control solenoid; Open or short circuit in solenoid wiring; Oxidized or damaged connectors; Low voltage in the on-board network.

How do I fix a P0079 diagnostic trouble code?

To fix P0079: Connect a diagnostic scanner and read all error codes. Check the vehicle's on-board voltage. Visually inspect the solenoid wiring for damage.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0079?

Limited driving only, diagnose soon

How much does it cost to fix P0079?

The estimated repair cost for P0079 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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