Intake Manifold Runner Position Sensor/Switch Circuit High Bank 1
Diagnostic trouble code P2017 indicates that the powertrain control module (PCM) has detected a voltage signal from the Intake Manifold Runner Control (IMRC) position sensor on Bank 1 that exceeds the maximum expected threshold. This high circuit condition typically points to an open circuit, a short to power, or a mechanical issue preventing the runner flaps from reaching their commanded position.
While this code rarely causes a vehicle to stall or break down, it can lead to poor engine performance and reduced fuel economy. It should be diagnosed and repaired soon to restore proper drivability and emissions control.
Common symptoms
- Illuminated Check Engine Light
- Rough or unstable engine idle
- Hesitation or stumbling during acceleration
- Noticeable loss of low-end engine torque
- Decreased fuel efficiency
Likely causes
- Faulty Intake Manifold Runner Control (IMRC) position sensor or switch
- Open or shorted wiring in the IMRC sensor circuit
- Corroded or damaged electrical connectors at the sensor
- Carbon buildup causing the intake manifold runner flaps to bind or stick
- Defective IMRC actuator or vacuum control solenoid
What to check before replacing parts
Visually inspect the IMRC sensor wiring harness and connectors.
Look for: Look for broken wires, melted insulation, or corroded pins that could cause an open circuit or short to voltage.
Monitor the IMRC position sensor voltage using a scan tool.
Look for: Observe the live data while commanding the IMRC actuator; the voltage should change smoothly. A constant high voltage (often near 5V) indicates an open circuit or short to power.
Manually check the intake manifold runner flaps for physical binding.
Look for: Disconnect the actuator linkage and move the flaps by hand. They should move freely without excessive resistance or sticking caused by carbon buildup.
Test the IMRC position sensor with a digital multimeter.
Look for: Check the sensor's resistance or voltage output against manufacturer specifications. An out-of-limits reading confirms an internal sensor failure.
Check the IMRC sensor reference voltage and ground circuits.
Look for: Verify that the sensor is receiving a steady 5-volt reference and has a solid ground. A missing ground can cause the signal voltage to default high.
This page explains the generic P2017 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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