Home / DTC / P2006 — Intake Manifold Runner Control Stuck Closed Bank 1

P2006 — Intake Manifold Runner Control Stuck Closed Bank 1

Detailed page for trouble code P2006.

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Code

P2006

Generic P — Powertrain

Intake Manifold Runner Control Stuck Closed Bank 1

Brand: Generic
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Page language: EN

Causes

  • Carbon or sludge buildup preventing runner movement
  • Faulty IMRC actuator (vacuum, electric motor, or solenoid)
  • Broken or seized linkage, lever or pivot
  • Vacuum supply failure (hose leak, failed vacuum solenoid)
  • Wiring fault or connector corrosion at actuator or position sensor
  • Faulty intake manifold runner position sensor (if equipped)

Symptoms

  • Check Engine light (Malfunction Indicator Lamp) illuminated
  • Reduced engine power and torque, especially at certain RPM ranges
  • Rough idle or hesitation on acceleration
  • Poor fuel economy
  • Possible surging or stumble during throttle transitions
  • Engine may enter reduced power / limp mode on some vehicles

What to check

  • Read codes and freeze-frame data with a scan tool; confirm P2006 and note conditions when set
  • Check for related codes (other IMRC or vacuum-related codes)
  • Perform a visual inspection of intake manifold area: vacuum lines, actuator, connectors and linkages
  • Using a scan tool, command the IMRC open and closed and observe actual response or position PID
  • Inspect vacuum supply: check hoses, fittings, and vacuum source for leaks or loss of vacuum
  • Manually operate actuator (apply vacuum or battery power per manufacturer procedure) to verify movement

Signal parameters

  • Commanded position vs actual position PID should change when IMRC is commanded (percent or angle)
  • Actuator electrical: motor/solenoid voltage should respond to commands (design dependent; typically 0–12V or PWM duty cycle)
  • Position sensor (if present): voltage typically varies with position (commonly ~0.5–4.5 V range)
  • Vacuum-actuated systems: engine vacuum at idle commonly present (engine vacuum around ~15–22 inHg) and vacuum at actuator should hold under command
  • Response time: runner should move within a few seconds after command; no motion indicates fault

Diagnostic algorithm

  1. Confirm the code and note freeze-frame / driving conditions when fault occurred
  2. Inspect: visually check vacuum lines, actuator, connectors and wiring for damage or disconnection
  3. Using a scan tool, command the IMRC to open and closed while monitoring position PID or listening/observing movement
  4. Check vacuum supply (for vacuum actuators): apply vacuum with hand pump to actuator and see if runner moves and holds vacuum
  5. For electric actuators: check power and ground at the actuator when commanding; measure actuator resistance per service data
  6. Manually operate linkage (per safe manufacturer procedure) to determine if mechanical binding or carbon is preventing movement
  7. If actuator responds electrically but runners do not move, remove intake manifold or access port and inspect runners and pivots for carbon, debris, or broken components; clean or repair as needed
  8. If actuator fails to respond to commands and wiring checks good, bench-test or replace the actuator/solenoid
  9. After repairs, clear codes and road-test to confirm IMRC operates correctly and code does not return
  10. If repeated faults with correct operation, consider module/software verification or replacement as last resort

Likely causes

  • Carbon deposits or soot jamming the runner
  • Failed actuator (vacuum diaphragm torn or motor seized)
  • Disconnected or leaking vacuum line to the actuator
  • Broken linkage or seized pivot bearing
  • Faulty position sensor or poor electrical connection

Fault status

⚠️ Status
Intake Manifold Runner Control (IMRC) - Stuck Closed - Bank 1
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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