[SOLVED] P3401 Code: Fix Cylinder 1 Deactivation Solenoid Valve Control Circuit

The P3401 fault code in automobiles indicates a problem with the Valve Lifter Oil Manifold Assembly. The most common symptom is the Engine Light turning on. The cause of this issue could be low oil pressure, restricted oil passage, faulty valve lifter oil manifold assembly, or a poor electrical connection.

It is important to address this issue promptly as it can lead to engine damage. The repair difficulty is moderate, and it takes around 1.0 hour to fix.

To interpret the fault code, one needs to check the possible causes listed above and visually inspect the related wiring harness and connectors.

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 p3401 fault code.

Here are the symptoms to look out for:

  • The P3401 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 rough idling, poor acceleration, decreased fuel efficiency, engine misfires, and stalling.
  • Additionally, the vehicle may experience a loss of power or have difficulty starting.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

P3401 fault code in automobiles can be caused by various factors, including low oil pressure and faulty valve lifter oil manifold assembly.

  • The automobile fault code P3401 can be caused by low oil pressure.
  • It can also be caused by a restricted oil passage.
  • Another cause of this fault code is a faulty Valve Lifter Oil Manifold Assembly.
  • An open or shorted Valve Lifter Oil Manifold Assembly harness can also trigger this code.
  • A poor electrical connection in the Valve Lifter Oil Manifold Assembly circuit can also be a cause.
  • Lastly, a faulty Engine Control Module (ECM) can also be a reason for the P3401 fault code.

To fix the p3401 automobile fault code, check the possible causes and inspect the related wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p3401, 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 P3401 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 fixing the P3401 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 P3401 code refers to the cylinder 1 deactivation solenoid valve control circuit. The engine control module commands cylinder deactivation to provide maximum fuel economy under light load driving conditions. Cylinder deactivation is accomplished by not allowing the intake and exhaust valves to open on the selected cylinders by using special valve lifters.

Switching between V8 and V4 modes is accomplished in less than 250 milliseconds, making the transitions seamless and transparent to the vehicle operator. If all enabling conditions are met and maintained for cylinder deactivation operation, the ECM calibrations will limit cylinder deactivation to a cycle time of 10 minutes in V4 mode, then return to V8 mode for 1 minute.

What are the possible causes of the P3401 automobile fault code?

If you’re experiencing the P3401 fault code, your engine light may be on. This could be due to low oil pressure, a restricted oil passage, a faulty valve lifter oil manifold assembly, or a poor electrical connection in the valve lifter oil manifold assembly circuit. To fix the issue, check the possible causes listed above and visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.

How can I fix the P3401 automobile fault code?

If you’re experiencing the P3401 fault code, which is indicated by the engine light or service engine soon warning light, there are a few possible causes to consider. These include low oil pressure, restricted oil passage, a faulty valve lifter oil manifold assembly, an open or shorted valve lifter oil manifold assembly harness, poor electrical connection in the valve lifter oil manifold assembly circuit, or a faulty engine control module (ECM). To fix the issue, inspect the related wiring harness and connectors for damage, and check for broken, bent, pushed out, or corroded connector pins.

What should I visually inspect to diagnose the P3401 automobile fault code?

If you’re experiencing the P3401 fault code, you may notice that your engine light is on. This could be caused by low oil pressure, a restricted oil passage, a faulty valve lifter oil manifold assembly, an open or shorted valve lifter oil manifold assembly harness, a poor electrical connection in the valve lifter oil manifold assembly circuit, or a faulty engine control module (ECM). To diagnose the issue, visually inspect the related wiring harness and connectors, checking for damaged components and broken, bent, pushed out, or corroded connector pins.

p3401 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light due to P3401, check for low oil pressure, restricted oil passage, faulty Valve Lifter Oil Manifold Assembly, or poor electrical connection.

Visually inspect the related wiring harness and connectors for any damage or corrosion.

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