[SOLVED] P3408 Code: Fixing High Exhaust Valve Control Circuit In Cylinder 1

The P3408 fault code in automobiles indicates a problem with the Cylinder Deactivation System. The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light.

The cause of this fault code can be low oil pressure, restricted oil passage, engine mechanical condition, faulty Cylinder Deactivation Solenoid, or poor electrical connection in the Cylinder Deactivation Solenoid circuit.

The repair importance is high as it can lead to engine damage if not addressed promptly. The repair difficulty is moderate, and the fix involves visually inspecting the wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector’s pins. The repair time is estimated to be around 1.0 hour.

It is essential to interpret the fault code to identify the root cause of the problem and take appropriate action.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be a sign of p3408 fault code.

Here are the symptoms to look out for:

  • The P3408 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include reduced engine power, engine misfires, rough idling, and decreased fuel efficiency.
  • Additionally, the vehicle may experience stalling or hesitation during acceleration, and there may be a noticeable decrease in overall performance.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe operation on the road.

P3408 fault code can be caused by various factors such as low oil pressure, restricted oil passage, and faulty cylinder deactivation solenoid.

  • The automobile fault code P3408 can be caused by low oil pressure.
  • It can also be caused by a restricted oil passage or an engine mechanical condition.
  • Another cause of this fault code is a faulty Cylinder Deactivation Solenoid.
  • Additionally, the Cylinder Deactivation Solenoid harness being open or shorted can cause this fault code.
  • Lastly, a poor electrical connection in the Cylinder Deactivation Solenoid circuit can also be a cause of the P3408 fault code.

To fix the p3408 automobile fault code, check the possible causes and inspect related wiring harness and connectors for damage.

  • To fix the automobile fault code p3408, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors.
  • Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code P3408 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops.

Therefore, the total cost of fixing the P3408 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The P3408 code is related to the cylinder deactivation system in the engine. The system deactivates certain cylinders to improve fuel economy under light load driving conditions.

The ECM commands the deactivation of cylinders 1 and 7 on the left bank, and cylinders 4 and 6 on the right bank, switching to a V4 mode.

Cylinder deactivation is accomplished by not allowing the intake and exhaust valves to open on the selected cylinders by using special valve lifters. The P3408 code indicates that there is a high circuit in the exhaust valve control for cylinder 1.

What are the possible causes of the P3408 automobile fault code?

If you see the engine light on or service engine soon warning light, it could be due to the P3408 fault code. This code can be caused by low oil pressure, restricted oil passage, engine mechanical condition, faulty cylinder deactivation solenoid, cylinder deactivation solenoid harness being open or shorted, or cylinder deactivation solenoid circuit poor electrical connection. To fix this issue, you should check the possible causes listed above, visually inspect the related wiring harness and connectors, and look for damaged components and broken, bent, pushed out, or corroded connector’s pins.

How can I visually inspect the related wiring harness and connectors to fix the P3408 fault code?

If you’re experiencing the P3408 fault code, start by checking the possible causes listed above. To visually inspect the related wiring harness and connectors, look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins. This will help you identify any issues with the Cylinder Deactivation Solenoid harness, which could be open or shorted, or have a poor electrical connection.

What are the potential consequences of ignoring the P3408 fault code?

Ignoring the P3408 fault code, which indicates a problem with the Cylinder Deactivation Solenoid, can lead to serious consequences such as reduced fuel efficiency, engine damage, and even engine failure. The cause of the fault code can be due to low oil pressure, restricted oil passage, or a faulty solenoid, among other things. It is important to visually inspect the wiring harness and connectors and check for damaged components to prevent further damage.

p3408 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light with the P3408 code, check for low oil pressure, restricted oil passage, engine mechanical condition, faulty Cylinder Deactivation Solenoid, Cylinder Deactivation Solenoid harness, or poor electrical connection.

Visually inspect the related wiring harness and connectors, and check for damaged components and connector pins.

Scroll to Top