Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit Description
The intake manifold contains an intake plenum switchover valve. It is a moveable divider that changes the airflow characteristics of the intake manifold. Switchover vacuum solenoid valve is controlled by ECM. The control circuit is continuously monitored for an open condition, short to voltage or short to ground. DTC will set when fault detection circuit senses a voltage other than what is expected.
DTC will set when:
- Engine speed greater than 40 RPM.
- Battery voltage 7.5-14.0 volts.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.