[SOLVED] P3429 Code: Fixing Cylinder 4 Exhaust Valve Control Circuit

The P3429 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 p3429 fault code. Here are the symptoms to look out for:

  • The P3429 fault code in an automobile can cause several symptoms.
  • The most common symptom is the illumination of the engine light or service engine soon warning light.
  • Other symptoms include reduced engine power, engine misfires, rough idling, and poor acceleration.
  • Additionally, the vehicle may experience decreased fuel efficiency, stalling, and difficulty starting.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The automobile fault code P3429 can be caused by a variety of factors, including low oil pressure and faulty solenoids.

  • The automobile fault code P3429 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 the possible fixes for the automobile fault code p3429, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p3429, 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 P3429 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 P3429 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The P3429 code relates to the cylinder deactivation system in the engine.

The system deactivates certain cylinders to improve fuel economy. The ECM commands the deactivation of cylinders 1, 4, 6, and 7. Deactivation is achieved by not allowing the intake and exhaust valves to open.

The deactivation lifters contain spring-loaded locking pins that connect the internal pin housing of the lifter to the outer housing. Switching between V8 and V4 mode is accomplished in less than 250 milliseconds.

What are the possible causes of the P3429 automobile fault code?

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to the P3429 fault code. The possible causes of this code include 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. 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 P3429 fault code?

To fix the P3429 fault code, start by checking the possible causes listed above. Then, 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 poor electrical connection.

What are the symptoms of the P3429 automobile fault code?

The P3429 fault code is indicated by the Engine Light ON or Service Engine Soon Warning Light. The possible causes include low oil pressure, restricted oil passage, faulty Cylinder Deactivation Solenoid, and poor electrical connection in the Cylinder Deactivation Solenoid circuit. To fix the issue, one should visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

p3429 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to low oil pressure, restricted oil passage, or a faulty Cylinder Deactivation Solenoid. Check the possible causes listed above, visually inspect the wiring harness and connectors, and look for damaged components or corroded pins.

Scroll to Top