P3467 means the powertrain control module has detected voltage below its calibrated threshold on the control circuit for cylinder 9’s intake valve deactivation solenoid. This usually points to a short to ground, an internally failed solenoid, or a significant wiring fault on that specific cylinder’s circuit. As a result, the engine will typically remain in full-cylinder mode and cannot deactivate cylinder 9.
The solenoid coil can develop an internal short to ground or open winding, which pulls the control circuit voltage low and is the most common root cause of this code.
Damaged, melted, or chafed wiring between the PCM and the solenoid can allow the circuit to contact the engine block or another ground source.
Corrosion, moisture intrusion, or bent pins in the solenoid or PCM connector can create an unintended ground path or high-resistance short.
Incorrectly routed wiring, pinched harnesses, or improperly repaired connectors from earlier service can introduce intermittent shorts in the deactivation circuit.
A failed output driver inside the powertrain control module is a rare cause and should only be considered after the solenoid, wiring, and connectors have been thoroughly tested and ruled out.
Short trips are generally acceptable, but fuel economy will decrease because the engine cannot deactivate cylinder 9. If you notice valve train noise or rough running, have it diagnosed promptly to avoid potential mechanical damage.
Almost never. This code almost always stems from a failed solenoid or a wiring fault. PCM replacement is an uncommon last step and should only occur after the solenoid, harness, and connectors have been fully tested.
Low or degraded oil typically causes mechanical deactivation failures rather than electrical circuit codes. However, oil sludge can clog or damage the deactivation solenoid over time, so maintaining proper oil level and change intervals remains important.
Each deactivation solenoid operates on its own independent control circuit from the PCM. The electrical fault is isolated to cylinder 9’s intake valve solenoid, so other cylinders are unaffected unless they have separate issues.