The P3490 fault code in automobiles refers to a problem with the Cylinder Deactivation Solenoid. The symptom of this issue is the Engine Light turning on.

The cause of this problem can be due to low oil pressure, restricted oil passage, engine mechanical condition, faulty Cylinder Deactivation Solenoid, Cylinder Deactivation Solenoid harness being open or shorted, or poor electrical connection in the Cylinder Deactivation Solenoid circuit.

The repair importance is high as it can affect the engine’s performance. 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 1.0 hour.

To interpret the fault code, one needs to check the possible causes listed above.

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 p3490 fault code.

Here are the symptoms to look out for:

  • The P3490 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.

P3490 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 P3490 can be caused by low oil pressure, restricted oil passage, and engine mechanical condition.
  • It can also be caused by a faulty Cylinder Deactivation Solenoid, an open or shorted Cylinder Deactivation Solenoid harness, or a poor electrical connection in the Cylinder Deactivation Solenoid circuit.

Below are some possible fixes for the automobile fault code p3490, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p3490, 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 P3490 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour. Therefore, the total cost of diagnosis and fixing the P3490 fault code will depend on the hourly rate charged by the auto repair shop and the estimated repair time required to fix the issue.

The P3490 code refers to the cylinder deactivation system in the engine.

The system deactivates cylinders 1 and 7 on the left bank, and cylinders 4 and 6 on the right bank, switching to a V4 mode for maximum fuel economy under light load driving conditions.

The system deactivates cylinders by not allowing the intake and exhaust valves to open on the selected cylinders using special valve lifters.

The transitions between V8 and V4 mode are seamless and transparent to the vehicle operator, taking less than 250 milliseconds.

What are the possible causes of the P3490 automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the P3490 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 P3490 fault code?

If you’re experiencing the P3490 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 and circuit connections.

What are the potential consequences of ignoring the P3490 fault code?

Ignoring the P3490 fault code, which indicates a problem with the Cylinder Deactivation Solenoid, can lead to serious consequences such as reduced engine performance, decreased fuel efficiency, and potential engine damage. It is important to address the issue promptly by checking the possible causes, visually inspecting the wiring harness and connectors, and looking for damaged components or corroded pins.

p3490 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light with the fault code p3490, 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 wiring harness and connectors for damage or corrosion.

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