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2015 KIA FORTE
1.8L I4•FWD•AUTOMATIC•gas•G4NB
1 active safety recall on this vehicle — view recalls🏆Sponsored by Simon-Olivier Ricci
Repairs401Labor496Torque3402Fluid7DTC1080Battery1Maintenance0Recalls1
P3008low severityPowertrain

Turbo/Supercharger Bypass Valve Control Circuit

on 2015 Kia Forte 1.8L I4 · FWD

What this code means

The turbo bypass valve (diverter valve/blow-off valve) control circuit has a malfunction. The bypass valve recirculates pressurized air during throttle closure.

Symptoms

  • Check Engine Light
  • Compressor surge on deceleration
  • Flutter noise from turbo
  • Reduced boost response after throttle lift
  • Check Engine Light after spirited driving

Common causes

  • Faulty bypass valve solenoid
  • Torn bypass valve diaphragm
  • Wiring issue to solenoid
  • Vacuum line leak
  • PCM driver failure

Diagnostic steps

  1. Test bypass valve solenoid resistance
  2. Inspect vacuum lines to bypass valve
  3. Command solenoid with scan tool
  4. Check valve diaphragm for tears
  5. Inspect wiring and connector

Repair notes

Replace bypass valve or solenoid. Inspect vacuum hoses for cracks.

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