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P3436 OBD2: Cylinder 5 Deactivation/Intake Valve Control Circuit High

P3436 OBD2: Cylinder 5 Deactivation/Intake Valve Control Circuit High

What Does the P3436 Code Mean?

The P3436 code indicates a problem with the cylinder 5 deactivation or intake valve control circuit. This issue arises when the engine’s control module (PCM) detects that the intake valve for cylinder number five is not operating as commanded. This can lead to decreased engine performance, especially in vehicles equipped with cylinder deactivation systems designed to optimize fuel consumption and emissions.

What Causes the P3436 Code?

The primary causes of the P3436 code include:

  • Engine oil level is too low
  • Powertrain Control Module (PCM) failure
  • Variable valve timing solenoid failure
  • Wiring issues related to the intake valve control circuit

What Are the Symptoms of the P3436 Code?

Drivers may experience several symptoms when the P3436 code is triggered, including:

  • Decreased engine performance
  • Increased fuel consumption

How Serious Is the P3436 Code?

The P3436 code is considered urgent, and it indicates that immediate action is necessary. Ignoring this code can lead to severe damage to the vehicle or pose risks to the driver and passengers. It is crucial to address this issue promptly to avoid further complications.

How to Diagnose the P3436 Code

Diagnosing the P3436 code involves the following steps:

  1. Use an OBD-II scanner to confirm the P3436 code and check for any related codes.
  2. Inspect the engine oil level and condition.
  3. Examine the wiring and connectors related to cylinder 5’s intake valve control circuit.
  4. Test the variable valve timing solenoid and PCM for proper functionality.

Common Repairs for the P3436 Code

Repairs for the P3436 code typically include:

  • Refilling or changing the engine oil if levels are low.
  • Replacing a faulty variable valve timing solenoid.
  • Repairing or replacing damaged wiring and connectors.
  • In some cases, replacing the PCM may be necessary.

How Much Does It Cost to Fix the P3436 Code?

The cost to fix the P3436 code can vary significantly based on the specific repair needed. On average, you might expect to pay between $100 to $1,500, depending on whether it involves simple fixes like oil changes or more complex repairs like replacing the PCM.

Can I Fix the P3436 Code Myself?

Fixing the P3436 code yourself is possible if you have a good understanding of automotive systems and the necessary tools. However, be aware that diagnosing and repairing issues with the PCM or variable valve timing solenoid may require specialized knowledge. If you’re unsure, it’s advisable to seek professional assistance to ensure proper handling of the issue.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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