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P2004 – BMW DTC

BMW DTC P2004 – Intake Manifold Runner Control Stuck Open (Bank 1)

DTC P2004 meaning on BMW

DTC P2004 on a BMW indicates that the Intake Manifold Runner Control (IMRC) is stuck open on Bank 1. The IMRC system is designed to vary the length of the intake runners to optimize engine performance at different RPMs. When the control is stuck open, it can lead to improper air-fuel mixture and affect engine performance.

BMW DTC P2004 symptoms

Symptoms of DTC P2004 on a BMW may include:

  • Check Engine Light illuminated
  • Reduced engine power
  • Poor acceleration
  • Rough idling
  • Decreased fuel efficiency

BMW DTC P2004 causes

Common causes of DTC P2004 on a BMW include:

  • Failed Intake Manifold Runner Control (IMRC) actuator
  • Carbon buildup in the intake manifold
  • Wiring or connector issues
  • Intake manifold runner control valve stuck open

BMW DTC P2004 seriousness

DTC P2004 should not be ignored as it can lead to poor engine performance and reduced fuel efficiency. Continuing to drive with this fault may cause further damage to the engine components.

How to diagnose DTC P2004 on BMW

To diagnose DTC P2004 on a BMW, a mechanic may perform the following steps:

  1. Use a diagnostic scanner to retrieve the fault code
  2. Inspect the intake manifold runner control system for any visible damage or obstructions
  3. Check the wiring and connectors for any signs of wear or corrosion
  4. Test the IMRC actuator for proper operation

How to fix DTC P2004 on BMW

To fix DTC P2004 on a BMW, the following steps may be taken:

  1. Replace the faulty Intake Manifold Runner Control (IMRC) actuator
  2. Clean the intake manifold to remove any carbon buildup
  3. Repair or replace any damaged wiring or connectors
  4. Reset the fault code and perform a test drive to ensure the issue is resolved

How to erase DTC P2004 on BMW

To erase DTC P2004 on a BMW, follow these steps:

  1. Use a diagnostic scanner to clear the fault code
  2. Ensure that the underlying issue causing the fault code has been addressed
  3. Perform a test drive to confirm that the Check Engine Light does not reappear

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

← All BMW Diagnostic Trouble Codes

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