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2021 MAZDA MX-5 MIATA

2.0L I4•RWD•MANUAL•gas
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Repairs0Labor564Torque5751Fluid8DTC919Battery0Maintenance0Recalls0
P2004moderate severityPowertrain

Intake Manifold Runner Control Stuck Open Bank 1

on 2021 Mazda MX-5 Miata 2.0L I4 · RWD

What this code means

The variable intake manifold runner flaps on bank 1 are stuck in the open position.

Symptoms

  • Reduced low-RPM torque
  • Check engine light
  • Rough idle
  • Poor fuel economy

Common causes

  • Broken runner flap linkage
  • Failed actuator motor
  • Carbon buildup on flaps
  • Vacuum leak

Diagnostic steps

  1. Inspect intake manifold runner mechanism
  2. Test actuator motor
  3. Check vacuum lines if applicable

Repair notes

Clean carbon deposits from runner flaps. Replace actuator motor or linkage as needed.

Other Powertrain codes on this vehicle

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