P105d Intake Valve Stuck in High Lift Position: 5 Causes & Fixes

The display of the Jeep shows different error codes based on internal problems. Such an error code is the P105d. This code indicates that the intake valve is stuck in a high lift position.

So, what are the causes behind the P105d Intake Valve Stuck in High Lift Position?

The intake valve can get stuck in a high lift position due to inadequate oil pressure. So the pressure of the oil must be maintained properly to avoid this problem. The issue can also arise due to the failure of the VVT solenoid. Replacing the solenoid will fix the issue. Incorrectly installing the Rocker Arm can also cause the intake valve to get stuck.

This is just the tip of the iceberg. Fixing the stuck intake valve will require more knowledge. So please keep reading!

P105d Intake Valve Stuck in High Lift Position: Quick Solution

P105d is an error code used in different models of the Jeep. This code is displayed when the intake valve is stuck in the high lift position. This situation can happen because of several reasons.

You can see the possible causes of this problem and their solutions at a glance below.

Reason	Solution
Rocker Arms Having Inadequate Oil Pressure	Ensure Adequate Oil Pressure
Mechanical Failure in The VVT Solenoid	Replace the VVT Solenoid
Improper Installation of The Rocker Arm	Reinstall The Rocker Arm
Low Lift Cam Lobe Worn Out	Repair or Replace the Camshaft
Stuck Rocker Arm Lock Pin	Reinstall the Rocker Arm Lock Pin

This table shows only the basic idea about the causes behind a stuck valve. More detailed knowledge on this matter is necessary for solving the issue. So keep scrolling!

P105d Intake Valve Stuck in High Lift Position: Detailed Solution

Fixing the stuck intake valve is not as complex as the C123f code. But you must diagnose the problem correctly and then take the required steps. Here I will present the symptoms of the most common causes with their solutions.

Rocker Arms Having Inadequate Oil Pressure:

The oil pressure plays a very important role in moving the intake valves. If the pressure in the Rocker Arms of the Jeep is less, the intake valves can malfunction. Even the valve can get stuck at the high lift position due to inadequate oil pressure.

Symptoms:

This situation can arise in the 2017 Chrysler Pacifica P105d and 2017 Grand Cherokee P105d and other models. There are some exact symptoms of low oil pressure.

The oil Warning Light turns On.
Knocking noises are produced.
The smell of burnt oil.
Fuel consumption increases.
Overheating of Engine.
Jeep performance declines.

These situations indicate the decrease of oil pressure in the Rocker Arm. And then, the intake valve gets stuck in the high lift position.

Solution:

The solution of the low oil pressure in the Rocker Arms is given below.

Make sure the engine oil is in adequate amounts.
Select the viscosity of the oil after discussing it with an experienced mechanic.
Check out the oil chamber of the Jeep for leakages.
The pressure gauge must be functional for correct readings.

You can solve the problem of low oil pressure by following the above measures.

Mechanical Failure in The VVT Solenoid:

I have mentioned earlier that the function of the intake valve depends on the oil pressure. And the flow of oil is dependent on the VVT Solenoid. The full form of the VVT solenoid is the Variable Valve Timing solenoid.

This solenoid controls the flow of oil depending on the engine speed and load. If the VVT solenoid fails, the flow of oil gets disturbed. As a result, the intake valve gets stuck in the high lift position. Then the P105d in Jeep Grand Cherokee is faced by the user.

Symptoms:

The symptoms of a failed VVT Solenoid are given below.

The Check Engine Light will turn on.
The engine oil will become dirty very rapidly.
Idling the engine becomes rough.
The fuel efficiency decreases.

If you observe these symptoms before the intake valve gets stuck, the problem is in the VVT solenoid. You will need to fix the solenoid for fixing the P105d Jeep.

Solution:

You will need to replace the VVT solenoid if it is damaged. Here is how you can replace it.

Open the hood and engine cover of the Jeep.
Now disconnect the battery very carefully.
Find the VVT solenoid. It is usually situated in the front part of the engine.
Unmount the solenoid from the engine.
Disconnect all the wires of the solenoid and remove them completely.
Install the new VVT solenoid.
Reassemble the engine hood and cover.

If you are inexperienced about changing this part, take help from a Jeep mechanic.

Improper Installation of The Rocker Arm:

The Rocker Arm of the Jeep is very important like the Jeep service park assist system. It connects the pushrod with the intake valve. The intake valve will get stuck if the installation of the arm is incorrect. So any issue in this arm will display the code in the Chrysler P105d.

For this reason, heavy precision is necessary while installing Rocker Arms in the 2017 Dodge Durango. Or else, the arm will have to be reinstalled after disassembling it.

Symptoms:

The Jeep will show some common symptoms if the Rocker Arm is installed incorrectly. Look for the below-given symptoms to identify the installation issue easily.

Ticking or Clicking Noises.
The performance of the engine drops. Sometimes the engine might start stalling too.
The Check Engine Light will turn On.
The Rocker Arm can bend or crack if installed inaccurately.

These symptoms indicate that there is something wrong with the installation of the Rocker Arm.

Solution:

The only solution to a wrongly installed Rocker Arm is to reinstall it. If the Rocker Arm is broken due to the wrong installation, you will need to replace it. The price of the Rocker Arm is between $100 to $500. And the mechanics will charge around $500 to $1000 for the replacement.

Low Lift Cam Lobe Worn Out:

The movement of the intake valve happens due to the push of the camshaft. The camshaft is made of several cam lobes joined together. If any of these lobes are worn out, the camshaft will not function properly.

Then the push given to the intake valve will be inadequate. As a result, the intake valve will be stuck in a high lift position. Even a very small amount of wear in the cam lobe can cause serious issues in the camshaft.

So the lobes must be checked thoroughly for identifying this issue.

Symptoms:

The symptoms of flattened cam lobes are very easy to identify. Here are the major symptoms that a worn-out cam lobe will show.

Lack of lubrication.
Pitting on the camshaft.
Excess noise.

Now let’s check out the solution to this problem.

Solution:

The camshaft can be repaired if the amount of wear is less. Otherwise, you will need to completely replace the camshaft. However, only an experienced mechanic can replace or rebuild the camshaft and fix the P105d Dodge.

The mechanic will Weld the camshaft if the wear rate is very high. And Regrinding is performed for a low amount of wear.

Stuck Rocker Arm Lock Pin:

The Rocker Arm comes with a lock pic that is very important for its function. The arm will malfunction if the pic broken or stuck. Then the intake valve can get stuck in the high lift position. The only way to solve this problem is by reinstalling the Rocker Arm pin. Take your Jeep to a professional for this work.

These are the major causes and solutions of the intake valve stuck in a high lift position. The steps are very simple similar to fixing the U1110 code. Make sure to diagnose the reason behind the problem properly to fix it easily.

Check out the following video for gathering more knowledge on the topic:

Frequently Asked Questions (FAQs):

What is the code P105c?

The code P105c indicates that the intake valve is stuck in a low lift position. This happens due to inadequate oil pressure in the rocker’s arm. Sometimes the problem can also happen if the arm is incorrectly installed or has a stuck pin. Excessive wear on the cam lobes can also cause the problem.

What is the code P0302 on a Jeep Grand Cherokee?

The code P0302 on a Jeep Grand Cherokee means there are misfires in cylinder number two. This problem generally happens due to a faulty spark plug. Also, low engine compression can cause the cylinder to misfire in the Jeep Grand Cherokee. Replacing the spark plug is a quick fix for this issue.

Why are they called Jeeps?

There are several claims behind the name Jeep. Many people think the name came from the letters ‘GP’. The military abbreviation for GP is General Purpose. On the other hand, some people think the name came from a character from the Popeye comics. The name of the character is Eugene the Jeep.

Conclusion

This is all on the P105d intake valve stuck in high lift position. Now you can easily diagnose the reason that is causing this issue and fix it.

The causes behind the P105D can be quite complex for inexperienced Jeep owners. Take your Jeep to a licensed mechanic in such a case. Then the problem will be fixed quickly and correctly.