Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Manifold tunning valve circuit open or shorted - Manifold tunning valve poor electrical connection

Description

This Powertrain Control Module (PCM) compares the circuit feedback to a calibrated closed range when when the circuit is de-energized or to a calibrated open range when the circuit is energized. If the value is to be determined to be out of the calibrated range in either the de-energized.