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.
DTC P1289: Manifold Tune Valve Solenoid Circuit: Description
Manifold Tune Valve (MTV) solenoid circuit voltage is monitored with engine running. Powertrain Control Module (PCM) actuates MTV solenoid at Wide Open Throttle (WOT) with engine speed at less than 3008 RPM. MTV solenoid controls a intake manifold mounted servo. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MTV solenoid circuit is not in expected state. Possible causes for DTC to set are: defective MTV solenoid, defective PCM, defective connector or defective wiring.
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.