P2021 MERCURY - Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
- Faulty Intake Manifold Runner Position Sensor/Switch
- Intake Manifold Runner Position Sensor/Switch harness is open or shorted
- Intake Manifold Runner Position Sensor/Switch circuit poor electrical connection
- Mechanical concern
- bind, seize, damage, or obstruction of IMRC hardware
- Engine Light ON (or Service Engine Soon Warning Light)
P2021 Mercury DescriptionThe Intake Manifold Runner Control (IMRC) system is monitored for failure during continuous or Key On Engine Off (KOEO) self-test. Each code distinguishes the corresponding bank for IMRC actuator assemblies with dual monitor switches. The test fails when the system detects the presence of a broken or persistently out of range linkage. The code sets when the Powertrain Control Module (PCM) has detected a mechanical fault in the Intake Manifold Runner Control (IMRC) system.
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