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Understanding Diagnostic Trouble Code P3416 Cylinder 2 Exhaust Valve Control Circuit High GuideMechanic.Com Modern vehicles are built with advanced engine technologies aimed at improving fuel efficiency, reducing emissions, and enhancing performance.
One of these technologies is Variable Valve Timing (VVT) and cylinder deactivation, which allows the engine control module (ECM) or powertrain control module (PCM) to activate or deactivate individual valves or cylinders as needed.
These systems rely heavily on actuators, sensors, and solenoids that control the movement of intake and exhaust valves.
When something goes wrong in these systems, the PCM stores a Diagnostic Trouble Code (DTC) to assist in identifying the problem.
One such code is P3416 – Cylinder 2 Exhaust Valve Control Circuit High. This article will cover everything you need to know about this code, including its meaning, symptoms, causes, diagnostic steps, and repair solutions.
See Also: P3417 Cylinder 3 Deactivation/Intake Valve Control Circuit/Open
P3416 Cylinder 2 Exhaust Valve Control Circuit High
What Is DTC P3416?
Code P3416 stands for “Cylinder 2 Exhaust Valve Control Circuit High.” This means that the PCM has detected an abnormally high voltage in the electrical circuit that controls the exhaust valve actuator for cylinder 2.
In many engines with variable valve control systems, the PCM sends electrical signals to solenoids that adjust valve operation based on engine load and speed.
If the voltage in this circuit is higher than expected—typically due to an open circuit, broken wire, or faulty component—the PCM logs code P3416.
Unlike codes indicating mechanical failure or poor performance (e.g., P3414), this is strictly an electrical circuit issue where the signal is either being interrupted or over-voltaged.
What Systems Are Affected?
P3416 usually affects engines equipped with Active Fuel Management (AFM) or Variable Cylinder Management (VCM) systems found in various General Motors, Honda, Chrysler, and other modern engines. These systems are used to deactivate specific cylinders under low-load conditions to improve fuel economy.
In this case, the exhaust valve on cylinder 2 is the one being mismanaged due to electrical issues within its control circuit.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
Symptoms of P3416
Depending on the severity of the fault, the vehicle may exhibit the following symptoms:
Check Engine Light (CEL) On
The most common and immediate indicator.
Rough Idle
Exhaust valve timing errors may cause uneven or unstable engine idling.
Engine Misfire (especially on Cylinder 2)
If the exhaust valve fails to operate properly, exhaust gases can remain in the cylinder, causing a misfire.
Reduced Engine Power
The engine may enter “limp mode” to protect itself, reducing power output.
Poor Fuel Economy
With improper valve timing, the engine runs less efficiently.
Unusual Engine Noises
Ticking or knocking sounds may be heard due to incorrect valve operation.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
Common Causes of P3416
P3416 is most commonly triggered by electrical or wiring issues that result in an abnormally high signal voltage in the exhaust valve control circuit. Typical causes include:
Open Circuit or Broken Wire
A disconnected or broken wire can cause high voltage due to lack of grounding or circuit completion.
Faulty Exhaust Valve Control Solenoid (Cylinder 2)
The solenoid may be internally damaged and causing high resistance or open circuits.
Poor or Corroded Electrical Connections
Corroded connectors or terminals can cause high resistance and misread voltages.
Short to Voltage
A wiring issue where a power source is unintentionally connected to the control wire can result in elevated voltage.
Faulty PCM or ECM
In rare cases, the powertrain control module itself may be sending incorrect voltage or misinterpreting sensor feedback.
Aftermarket Modifications
Incorrect installation of aftermarket parts (like remote starters or performance chips) can interfere with the valve control circuit.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
How to Diagnose Code P3416
Diagnosing this trouble code requires a systematic approach, including both visual and technical inspections. Here’s how to proceed:
1. Use a Diagnostic Scan Tool
Use a high-quality OBD-II scanner to verify the presence of P3416.
Check for other related codes like P0302 (cylinder 2 misfire), oil pressure codes, or other valve control circuit errors.
2. Perform a Visual Inspection
Check the wiring harness and connectors leading to the cylinder 2 exhaust valve control solenoid.
Look for frayed wires, disconnected plugs, corrosion, or signs of overheating or melting.
3. Test Circuit Voltage
With the ignition in the “on” position (engine off), use a multimeter to test the voltage at the solenoid connector.
A voltage significantly higher than expected (usually above 12V) may indicate a short to voltage or open circuit.
4. Measure Solenoid Resistance
Disconnect the solenoid and use a multimeter to test its resistance.
Compare with manufacturer specs (commonly around 8–15 ohms). If it’s out of range or infinite, the solenoid may be faulty.
5. Check PCM Outputs
If all other tests pass, use advanced diagnostic equipment to test the signal being sent from the PCM to the solenoid.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
How to Fix Code P3416
Once you’ve pinpointed the cause of the high voltage in the circuit, apply the appropriate repair. Here are common solutions:
Replace the Exhaust Valve Control Solenoid (Cylinder 2)
If the solenoid has high internal resistance or is open, replace it with an OEM-equivalent part.
Repair or Replace Faulty Wiring
Repair any broken or damaged wires, and replace connectors that are corroded or loose.
Clean Electrical Connections
Use electrical contact cleaner to remove corrosion or debris from terminals and plugs.
Replace or Reprogram PCM (if necessary)
If the PCM is confirmed to be the issue, replace it or update its software (this may require dealer tools).
Remove Aftermarket Interference
Disconnect or reconfigure any aftermarket components that may be interfering with the valve control circuit.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
Preventing Future Issues with P3416
To avoid seeing this code again, consider adopting the following preventive measures:
Regular Engine Inspections
Periodically check wires and connectors for damage or wear.
Use High-Quality Oil and Filters
Clean engine oil reduces sludge and protects actuators.
Avoid Aftermarket Electrical Tampering
Always install aftermarket electronics carefully, ensuring no circuits are compromised.
Routine PCM Software Updates
Some manufacturers release software updates to improve actuator performance and diagnostics.
P3416 Cylinder 2 Exhaust Valve Control Circuit High
Can You Drive with Code P3416?
Technically, yes—you can drive with code P3416 active. However, it’s not recommended for the following reasons:
- Prolonged driving with valve timing errors can cause internal engine damage.
- Reduced engine efficiency may result in increased emissions.
- Misfires can cause damage to the catalytic converter over time.
- It may cause the vehicle to enter limp mode, severely reducing performance.
- If this code appears, it’s best to have the issue diagnosed and repaired promptly.
Conclusion
The P3416 – Cylinder 2 Exhaust Valve Control Circuit High code is an electrical fault that indicates an unexpected high voltage in the exhaust valve actuator circuit.
Most often, the problem lies in wiring, a damaged solenoid, or a faulty PCM signal. If left unresolved, this issue can cause significant performance problems, increased emissions, and potential long-term damage to your engine.
With proper diagnostics and timely repair, this code can be cleared, and your engine can return to optimal performance.
Preventive maintenance—such as inspecting wiring, keeping connectors clean, and using quality oil—can help avoid this issue in the future.
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