Error code

OBD2 P2004

OBD2P2004
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Intake Manifold Runner Control Stuck Open.

Severity

moderateThe vehicle is generally drivable, but performance issues may occur.

Summary

Code P2004 indicates that the intake manifold runner control actuator for engine bank one is stuck in the open position. This issue affects the air flow management system of your vehicle.

Symptoms

  • Hesitation upon acceleration
  • Diminished fuel efficiency
  • Reduction in engine performance, especially at low RPM levels
  • Engine surge

Common Causes

  • Defective IMAC actuator solenoid
  • Bad intake manifold runner position sensor
  • Open or shorted wiring in the IMAC actuator solenoid control circuit
  • Faulty MAP Sensor
  • Loose or binding intake manifold runners
  • Corroded IMAC actuator solenoid connector face

Diagnosis

  1. Check for corrosion on the IMAC actuator connectors.
  2. Use a diagnostic scan tool to retrieve and clear codes.
  3. Perform resistance tests on the IMAC actuator solenoid and position sensor.
  4. Test system circuits for continuity and repair or replace as needed.

Fixes

  • Replace the faulty IMAC actuator solenoid or intake manifold runner position sensor if necessary.

FAQ

What should I do if my vehicle has code P2004?

Begin by checking for corrosion on the connectors and performing resistance tests on the IMAC actuator solenoid and position sensor. If issues are found, replace the faulty components.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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