Intake Manifold Runner Position Sensor/Switch Circuit High Bank 2
Diagnostic trouble code P2022 indicates that the powertrain control module (PCM) has detected a high electrical voltage signal from the intake manifold runner position sensor or switch circuit for Bank 2. This means the sensor's output voltage is exceeding the maximum expected threshold, suggesting a circuit issue or a sensor failure.
While this code rarely causes a vehicle to stall or become stranded, it can lead to reduced engine performance, poor fuel economy, and increased emissions. It should be diagnosed and repaired soon to restore optimal engine efficiency.
Common symptoms
- Illuminated Check Engine Light
- Reduced engine power or sluggish acceleration
- Rough idle or engine hesitation
- Decreased fuel efficiency
- Failed emissions test
Likely causes
- Faulty intake manifold runner position sensor/switch (Bank 2)
- Short to voltage in the sensor wiring harness
- Corroded, damaged, or loose electrical connector at the sensor
- Binding or stuck intake manifold runner flaps
- Vacuum leak affecting the runner control actuator
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Visually inspect the wiring and connector for the Bank 2 intake manifold runner position sensor.
Look for: Look for frayed wires, melted insulation, or a loose/corroded connector that could cause a short to voltage or poor connection.
Check the sensor's reference voltage and ground circuits using a digital multimeter.
Look for: Verify that the sensor is receiving the correct 5-volt reference and has a solid ground. A missing ground can cause the signal voltage to read high.
Test the signal wire voltage from the sensor to the PCM.
Look for: With the key on and engine off, back-probe the signal wire. If the voltage is constantly near 5 volts and does not change when the runner is manually moved, the sensor is likely shorted internally or the wire is shorted to voltage.
Manually actuate the intake manifold runner linkage for Bank 2.
Look for: Ensure the linkage moves freely without binding. If the flaps are stuck, the sensor may be reading an out-of-range position.
Test the intake manifold runner control actuator (vacuum or electronic).
Look for: Apply vacuum (if vacuum-operated) or command the actuator via a scan tool. Verify that the actuator moves the linkage fully and that the sensor voltage changes accordingly.
This page explains the generic P2022 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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