P1017 Buick Valvetronic Eccentric Shaft Sensor Plausibility

P1018 Buick Intake Manifold Runner Bank 2 Lower Limit Not Reached

Possible causes
– Faulty Intake Manifold Runner Motor 2
– Manifold Runner Motor 2 harness is open or shorted
– Manifold Runner Motor 2 circuit poor electrical connection
– Faulty Intake Manifold Flap 2
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
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