Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1
P2016 indicates the intake manifold runner control (IMRC) system is not functioning properly on Bank 1. The IMRC actuator or its control circuit is malfunctioning, preventing proper adjustment of the intake manifold runners to optimize airflow and engine performance.
What You Might Notice
- Check Engine Light illuminated
- Reduced engine power or acceleration
- Poor fuel economy
- Rough idle
- Hesitation during acceleration
Most Common Causes
- 1
Faulty IMRC actuator
The intake manifold runner control actuator is stuck, damaged, or electrically disconnected. This is the most common cause and prevents proper runner positioning.
- 2
IMRC actuator relay failure
The relay controlling power to the IMRC actuator is defective or burned out, cutting electrical supply to the actuator motor.
- 3
Wiring or connector issues
Corroded connectors, broken wires, or loose connections in the IMRC control circuit prevent proper electrical signals from reaching the actuator.
- 4
Faulty IMRC position sensor
The sensor that monitors runner position is malfunctioning, causing the PCM to lose feedback and inability to control the system properly.
How to Diagnose It
- 1
Check Faulty IMRC actuator — The intake manifold runner control actuator is stuck, damaged, or electrically disconnected. This is the most common cause and prevents proper runner positioning.
- 2
Check IMRC actuator relay failure — The relay controlling power to the IMRC actuator is defective or burned out, cutting electrical supply to the actuator motor.
- 3
Check Wiring or connector issues — Corroded connectors, broken wires, or loose connections in the IMRC control circuit prevent proper electrical signals from reaching the actuator.
- 4
Check Faulty IMRC position sensor — The sensor that monitors runner position is malfunctioning, causing the PCM to lose feedback and inability to control the system properly.
How to Fix It
- 1
Replace IMRC actuator
Remove and replace the faulty intake manifold runner control actuator assembly. This typically resolves the issue when the actuator is stuck or internally damaged.
- 2
Replace IMRC relay
Locate and replace the IMRC control relay in the main fuse/relay box. Verify relay part number matches your vehicle's specifications.
- 3
Inspect and repair wiring
Check all IMRC circuit connectors for corrosion or looseness. Repair or replace damaged wiring harness sections and reseat all connectors firmly.
- 4
Replace IMRC position sensor
If sensor diagnostics confirm failure, replace the IMRC position sensor and clear the code to allow system relearning.
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