Broken, chafed, or disconnected wire in the exhaust valve control circuit for cylinder 9; Corroded or loose electrical connector at the exhaust valve solenoid or actuator; Failed exhaust valve control solenoid or actuator (open coil or seized mechanism); Open circuit inside the PCM driver for that specific cylinder circuit; Damage to the wiring harness from heat, vibration, or rodent activity; Poor ground connection shared by the exhaust valve control system

DTC codes / P34xx · Auxiliary emission controls / P3469

P3469Cylinder 9 Exhaust Valve Control Circuit/Open

Q: What does code P3469 mean?

Cylinder 9 Exhaust Valve Control Circuit/Open. P3469 indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the electrical path for the exhaust valve control circuit of cylinder 9. This circuit typically commands a solenoid or actuator that manages exhaust valve timing or lift, and an open circuit means the PCM cannot reliably control that valve, which can affect engine breathing and emissions.

P3469 indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the electrical path for the exhaust valve control circuit of cylinder 9. This circuit typically commands a solenoid or actuator that manages exhaust valve timing or lift, and an open circuit means the PCM cannot reliably control that valve, which can affect engine breathing and emissions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or misfire-like shudder, especially when the engine is cold
Reduced engine power or sluggish acceleration under load
Poor fuel economy due to inefficient cylinder breathing
Intermittent hesitation or stumble during light-throttle cruising
Failed emissions test due to increased exhaust emissions

Common causes, most likely first

Broken, chafed, or disconnected wire in the exhaust valve control circuit for cylinder 9
Corroded or loose electrical connector at the exhaust valve solenoid or actuator
Failed exhaust valve control solenoid or actuator (open coil or seized mechanism)
Open circuit inside the PCM driver for that specific cylinder circuit
Damage to the wiring harness from heat, vibration, or rodent activity
Poor ground connection shared by the exhaust valve control system

How to diagnose and fix it

Connect a scan tool and verify P3469 is current, then check for related codes and freeze-frame data
Inspect the exhaust valve control solenoid connector and wiring for corrosion, looseness, or physical damage
Measure resistance of the exhaust valve control solenoid and compare to manufacturer specifications
Perform a voltage drop test on the power and ground sides of the circuit while commanding the actuator with a scan tool
Check continuity of the signal wire from the PCM to the solenoid to confirm an open circuit
If the circuit tests good, substitute a known-good solenoid or actuator to rule out a faulty component
Repair or replace the faulty wiring, connector, solenoid, or PCM as indicated by test results, then clear codes and verify the repair

When the wiring is not the real culprit

A failed exhaust valve solenoid can test open when the engine is hot but show normal resistance when cold, so always test the circuit both cold and at operating temperature.
The PCM may set P3469 if the exhaust valve control circuit is electrically intact but the actuator mechanically sticks, because the PCM monitors current feedback and interprets a lack of movement as an open circuit.
Rodent damage to the harness near the cylinder 9 exhaust valve is common on vehicles parked outdoors, and the chewed wire often looks fine under a quick visual inspection until the loom is opened.
A weak or failing battery can cause the PCM to misreport an open circuit on high-current actuator circuits, so always verify battery and charging system health before condemning the PCM.
P3469 can be stored alongside misfire codes for cylinder 9, but the misfire may be the root cause rather than a symptom, so diagnose the misfire first if both are present.

Can I keep driving with P3469?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration and towing because the inactive exhaust valve can cause poor combustion and overheating of the affected cylinder. Prolonged driving with this code may damage the catalytic converter or exhaust valve mechanism, so schedule diagnosis soon.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.