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DTC codes / P34xx · Auxiliary emission controls / P3417

P3417Cylinder 3 Deactivation/lntake Valve Control Circuit/Open

P3417 indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the control circuit for the cylinder 3 deactivation or intake valve control solenoid. This circuit manages valves that can disable a cylinder or alter intake airflow for fuel economy or performance, and an open circuit prevents the PCM from operating that valve.

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 vibration if the valve fails to actuate and the cylinder remains active when it should be deactivated.
  • Reduced fuel economy because the cylinder deactivation system cannot function as designed.
  • A slight hesitation or stumble during light-throttle cruising when the PCM attempts to transition between modes.
  • In some vehicles, a message on the driver information center indicating reduced engine power or service required.
  • Audible clicking or ticking from the valve cover area if the solenoid is attempting to operate but the circuit is intermittent.

Common causes, most likely first

  1. Broken, chafed, or corroded wiring in the cylinder 3 deactivation solenoid control circuit.
  2. Failed cylinder 3 deactivation or intake valve control solenoid with an open internal coil.
  3. Loose or corroded electrical connector at the solenoid or at the PCM.
  4. Open circuit inside the PCM driver for that specific solenoid, though this is less common.
  5. Oil sludge or debris blocking the solenoid valve, causing it to stick and draw abnormal current that the PCM interprets as an open circuit.
  6. Aftermarket or damaged wiring from previous repairs creating an open circuit.

How to diagnose and fix it

  1. Perform a visual inspection of the solenoid, its connector, and the wiring harness for damage, corrosion, or loose pins.
  2. Use a scan tool to command the cylinder 3 deactivation solenoid on and off while listening for a click and observing live data for the control circuit status.
  3. Measure resistance across the solenoid terminals with a multimeter and compare to the manufacturer's specification to check for an open coil.
  4. Check for battery voltage and ground at the solenoid connector with the key on, using a test light or multimeter, to verify the circuit integrity.
  5. If the circuit tests good, substitute a known-good solenoid of the same part number from another cylinder to see if the code follows the solenoid.
  6. Inspect the PCM connector for corrosion or pushed-out pins, and perform a wiggle test on the harness while monitoring the circuit status.
  7. If all electrical checks pass, follow the manufacturer's diagnostic flow chart for PCM testing or replacement, as an internal driver failure is possible but rare.

Don't overlook the simple wiring fault

  • A common oversight is replacing the solenoid without checking the harness for a broken wire inside the insulation, which can cause an intermittent open circuit that only appears when the engine is warm or vibrating.
  • The code can be set by a solenoid that is mechanically stuck due to oil sludge, even though the electrical circuit tests fine, so a visual inspection of the solenoid screen and oil condition is worthwhile.
  • Some vehicles use a single solenoid to control multiple cylinders, and a fault in that shared circuit can set codes for several cylinders, so always check for related codes before condemning a single component.
  • A poor ground connection at the engine block or chassis can cause a false open circuit code for the solenoid, so verifying ground integrity is a smart early step.
  • The PCM may set P3417 if the solenoid circuit is open only during certain operating conditions, such as when the engine is cold, so a road test with a scan tool recording live data is often necessary to reproduce the fault.

Can I keep driving with P3417?

You can generally continue driving with P3417, but the vehicle may enter a reduced-power mode or exhibit poor fuel economy, and prolonged driving with a misfire could damage the catalytic converter. Avoid heavy acceleration or towing until the fault is repaired, and have the circuit inspected promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

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

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