Fix P2019: Intake Manifold Runner Position Sensor Circuit High Input – Trust iCarsoft CR Eagle
If your check engine light turns on and you notice reduced power, rough idling, or hesitation during acceleration, your diagnostic tool may retrieve P2019. This trouble code points to a critical issue with your vehicle’s Intake Manifold Runner Control (IMRC) System—specifically an “Intake Manifold Runner Position Sensor Circuit High Input” malfunction. The IMRC system adjusts airflow for optimal engine performance, and a high input signal from the position sensor disrupts this regulation. Ignoring P2019 can lead to decreased fuel efficiency, engine misfires, and long-term component wear. In this guide, we’ll break down P2019, its causes, and how the iCarsoft CR Eagle—an OE-level diagnostic tool—helps you resolve it efficiently.
What Exactly Is Fault Code P2019?
P2019 is a generic OBD-II trouble code defined as “Intake Manifold Runner Position Sensor Circuit High Input”. Key details to understand:
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The IMRC position sensor monitors the position of movable runners (flaps) in the intake manifold, sending voltage signals to the Engine Control Unit (ECU).
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A “high input” means the ECU detects a voltage signal from the sensor that exceeds the normal operating range (typically 0.5V to 4.5V, depending on the vehicle).
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This indicates a disruption in the sensor’s circuit—either the sensor itself is faulty, wiring is damaged, or the IMRC runner is stuck in an abnormal position.
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P2019 applies to 1996+ OBD-II compliant vehicles with IMRC systems, including popular makes like Ford, Toyota, Honda, BMW, Mercedes-Benz, and VW.
Why Does P2019 Happen? Common Causes
Faulty IMRC Position Sensor
Internal electrical failure or wear from heat/vibration leads to consistently high voltage signals.
Wiring or Connector Issues
Frayed, shorted, or corroded wires, or loose connectors between the sensor and ECU, create a high-resistance circuit.
Stuck IMRC Runner
Carbon buildup or mechanical binding locks the runner in a fully open/closed position, forcing the sensor to send a high input signal.
Malfunctioning IMRC Actuator
The actuator that moves the runners fails, leaving the sensor in a fixed position that registers as high input.
Intake Manifold Leaks
Air leaks alter pressure dynamics, leading to false high readings from the sensor.
ECU Malfunction & Contaminated Sensor
Rarely, a faulty ECU misinterprets signals; soot/debris coats the sensor element, preventing accurate detection.
Symptoms of P2019
P2019 often presents noticeable symptoms, including:
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Illuminated check engine light (primary indicator).
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Reduced engine power and sluggish acceleration.
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Poor fuel efficiency due to inefficient airflow.
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Rough idling or engine misfires (especially at low to mid speeds).
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Hesitation when pressing the accelerator.
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In severe cases, engine stalling under load.
Why the iCarsoft CR Eagle Is Perfect for P2019
Basic scanners only read P2019, but the iCarsoft CR Eagle offers advanced features that simplify diagnosing and fixing the issue. Here’s why it stands out:
Full IMRC System Scans
Dives deep into the position sensor, actuator, wiring, and intake manifold to pinpoint the source of the high input signal.
Live Data Monitoring
Views real-time sensor voltage and IMRC runner position data to confirm if the signal is abnormally high.
Powerful Bi-directional Control
Sends commands to test the IMRC actuator—verifies if runners move correctly and if the sensor responds without disassembly.
Global Vehicle Coverage
Works with 58 major vehicle makes, including gasoline/diesel models and OBDI vehicles (with included adaptors like Benz38Pin and BMW20Pin).
Advanced Hardware
Features a 10.1-inch touchscreen, 4GB RAM + 128GB ROM, and dual-band Wi-Fi/Bluetooth for smooth wireless diagnostics.
ECU Coding & Adaptation
Reconfigures the ECU after sensor/actuator replacement to ensure seamless compatibility.
Bonus Features
Built-in TPMS programming (with 4 sensors) and a videoscope to inspect intake manifold runners for carbon buildup.
Lifetime Free Updates & Support
Stays compatible with new vehicle models and provides expert technical support.
How to Diagnose & Fix P2019 with the iCarsoft CR Eagle (Step-by-Step)
Step 1: Connect the Tool
Plug the CR Eagle’s OBD-II cable into your vehicle’s port (under the dashboard). Use included OBDI adaptors for older models.
Step 2: AutoVIN Identification
The tool automatically retrieves your vehicle’s make, model, and VIN—no manual entry needed.
Step 3: Scan for Codes
Select “Full System Scan” or “Engine System Scan” to pull up P2019 and related codes (e.g., P2015 for IMRC circuit malfunction).
Step 4: Check Live Data
Navigate to “Live Data” to monitor IMRC position sensor voltage. A reading above the vehicle’s normal range confirms a P2019 issue.
Step 5: Run Bi-directional Tests
Use the “Active Test” function to command the IMRC actuator to move the runners. No change in sensor voltage indicates a faulty sensor or stuck runner.
Step 6: Inspect Components
Use the CR Eagle’s videoscope to check intake manifold runners for clogs. Inspect the sensor for damage and wiring for corrosion.
Step 7: Repair or Replace Parts
Replace the faulty sensor/actuator, clean the intake manifold, repair wiring/connectors, or fix air leaks.
Step 8: Clear the Code & Verify
Use the CR Eagle to erase P2019, take a test drive, and re-scan to ensure the code doesn’t return. Use ECU adaptation to calibrate the new components.
FAQs: Your P2019 Questions Answered
Can I drive with P2019?
You can drive short distances, but reduced performance and fuel efficiency make prompt diagnosis with the CR Eagle critical. Avoid high speeds or heavy loads.
Will the CR Eagle work with my car?
Yes! It supports 58 major vehicle makes and all 1996+ OBD-II compliant vehicles with IMRC systems. It also works with OBDI models using included adaptors.
Do I need mechanical experience to use the CR Eagle?
No! Its 10.1-inch touchscreen, AutoVIN function, and clear prompts make it user-friendly for DIYers. Lifetime technical support is available if you need help.
Can the CR Eagle distinguish between a faulty sensor and stuck runner?
Absolutely. Bi-directional tests show if runners move (faulty sensor if movement occurs but voltage stays high; stuck runner if no movement).
Do I need to replace the sensor, or can I clean it?
The CR Eagle’s live data and videoscope help you decide—cleaning works for sensor port clogs; replacement is needed for electrical sensor failure.
Is the CR Eagle better than a basic scanner for P2019?
Yes. Basic scanners only read the code, but the CR Eagle offers live data, bi-directional tests, and videoscope integration—helping you avoid unnecessary part replacements.
How often should I update the CR Eagle?
Update every 3–6 months via free Wi-Fi updates to ensure compatibility with new IMRC system designs and diagnostic algorithms.
Does the CR Eagle come with everything I need?
Yes! It includes an OBD-II cable, 4 OBDI adaptors, 4 TPMS sensors, a videoscope, and a carrying case—no extra tools required for P2019 diagnosis.
Final Thoughts: Don’t Let P2019 Disrupt Your Engine’s Airflow
P2019 is a warning that your IMRC position sensor is sending a high input signal, compromising engine performance and efficiency. The iCarsoft CR Eagle isn’t just a tool for fixing P2019—it’s a comprehensive diagnostic solution that handles over 40 high-level service functions, making it a long-term investment for all your vehicle maintenance needs. Whether you’re a DIY enthusiast or a professional, the CR Eagle gives you the power to diagnose and fix P2019 right from your garage.
Invest in the iCarsoft CR Eagle today to tackle P2019 and hundreds of other codes—keep your vehicle running powerfully and efficiently.
