[SOLVED] P3420 Code: Fixing High Intake Valve Control Circuit In Cylinder 3

The P3420 fault code in automobiles indicates a problem with the Cylinder Deactivation System. The symptoms of this fault code include rough engine performance, decreased fuel efficiency, and illuminated check engine light.

The possible causes of this fault code are low oil pressure, restricted oil passage, engine mechanical condition, faulty Cylinder Deactivation Solenoid, Cylinder Deactivation Solenoid harness is open or shorted, and Cylinder Deactivation Solenoid circuit poor electrical connection. The repair importance of this fault code is high as it affects the engine’s performance and fuel efficiency. The repair difficulty is moderate, and the fix involves visually inspecting the related wiring harness and connectors and checking for damaged components and broken, bent, pushed out, or corroded connector’s pins.

The repair time for this fault code is 1.0 hour.

It is essential to interpret the fault code to identify the problem and fix it promptly.

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

Experiencing issues with engine performance?

Check out the following symptoms of the P3420 fault code.

  • The P3420 fault code is related to the Cylinder Deactivation System in the engine.
  • Symptoms of this fault code include rough idling, engine misfires, reduced power, decreased fuel efficiency, and illuminated Check Engine Light.
  • Additionally, the engine may produce unusual noises or vibrations, and the vehicle may experience difficulty starting or stalling.
  • It is important to address this issue promptly to prevent further damage to the engine and ensure optimal vehicle performance.

P3420 fault code in automobiles can be caused by various factors, including low oil pressure, restricted oil passage, and faulty cylinder deactivation solenoid.

  • The automobile fault code P3420 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, and Cylinder Deactivation Solenoid circuit having poor electrical connection.

Below are some possible fixes for the automobile fault code p3420, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p3420, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors for any damage.
  • Look 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 P3420 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 P3420 fault code will depend on the hourly rate charged by the auto repair shop and the estimated repair time.

The P3420 fault code is related to the cylinder deactivation system in the engine. When this code appears, the engine light or service engine soon warning light will turn on. This code indicates that there is a problem with the cylinder deactivation system, which can cause reduced fuel efficiency and engine performance.

It is important to have this issue diagnosed and repaired as soon as possible to prevent further damage to the engine. A qualified mechanic can use diagnostic tools to determine the exact cause of the problem and recommend the necessary repairs.

What are the possible causes of the P3420 automobile fault code?

The P3420 fault code in automobiles can be caused by low oil pressure, restricted oil passage, faulty cylinder deactivation solenoid, or poor electrical connection in the solenoid circuit. It can also be due to engine mechanical conditions or an open or shorted solenoid harness. To fix this issue, one should visually inspect the wiring harness and connectors for any damage or corrosion and check for broken or bent pins. Additionally, one should check the possible causes listed above.

How can one fix the P3420 automobile fault code?

If you’re experiencing the P3420 fault code, it could be due to low oil pressure, a restricted oil passage, engine mechanical condition, a faulty Cylinder Deactivation Solenoid, or a poor electrical connection in the Cylinder Deactivation Solenoid circuit. To fix it, start by visually inspecting the wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector pins.

What should be visually inspected when trying to fix the P3420 automobile fault code?

To fix the P3420 automobile fault code, start by visually inspecting the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins. Also, check the possible causes listed above, which include low oil pressure, restricted oil passage, engine mechanical condition, faulty cylinder deactivation solenoid, cylinder deactivation solenoid harness that is open or shorted, and cylinder deactivation solenoid circuit poor electrical connection.

p3420 error fault code explained

To fix the P3420 fault code, check for low oil pressure, restricted oil passage, engine mechanical condition, faulty cylinder deactivation solenoid, or poor electrical connection. Visually inspect the wiring harness and connectors for damage or corrosion. Look for broken, bent, or pushed out connector pins.

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