AutoCodes – Jeep – P3426 Jeep

P3426 Jeep Code - Cylinder 4 Deactivation Control Performance

Quick Answer

When all the criteria has been met,power is supplied to each Multi-Displacement System (MDS) Solenoid when engine is making a transition from 8 cylinder mode to 4 cylinder mode. Common causes include Low oil pressure, Restricted oil passage, Engine mechanical condition. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P3426 Jeep indicates Cylinder 4 Deactivation Control Performance.
Common causes: Common causes include Low oil pressure, Restricted oil passage, Engine mechanical condition.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,857

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P3426 Jeep Description

When all the criteria has been met,power is supplied to each Multi-Displacement System (MDS) Solenoid when engine is making a transition from 8 cylinder mode to 4 cylinder mode. By actuating the solenoid, oil pressure is raised to the pair of lifter that coincide with each particular solenoid. The oil pressure pushes in the locking pins that allows the lifter to collapse, decoupling the valves and camshafts.

OBDII Code P3426 Jeep - Cylinder 4 Deactivation Control Performance - AutoCodes.com — P3426 Jeep Code - Cylinder 4 Deactivation Control Performance

What does this mean?

What are the Possible Causes of the DTC P3426 Jeep?

Low oil pressure
Restricted oil passage
Engine mechanical condition
Faulty Multiple Displacement System (MDS) Solenoid
Multiple Displacement System (MDS) Solenoid harness is open or shorted
Multiple Displacement System (MDS) Solenoid circuit poor electrical connection

How to Fix the DTC P3426 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Although in some cases changing the engine oil may fix the problem, usually the Multi Displacement System Solenoid may need to replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P3426 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P3426 Jeep Code

1. What does the OBDII code P3426 mean on a Jeep?

P3426 indicates a problem with the Cylinder 4 Deactivation Control Performance, commonly related to the engine's cylinder deactivation system not functioning as expected.

2. What are the common symptoms of code P3426 on a Jeep?

Symptoms can include reduced fuel efficiency, an illuminated check engine light, rough idling, engine misfire, or reduced engine performance.

3. What causes the P3426 code on a Jeep?

Possible causes include a faulty cylinder deactivation solenoid, clogged oil passages, low engine oil pressure, wiring or connector issues, or a malfunctioning engine control module (ECM).

4. How do I diagnose the P3426 code on my Jeep?

Start by checking the engine oil level and condition, inspecting the wiring and connectors for damage, and testing the cylinder deactivation solenoid for proper operation.

5. Can driving with code P3426 damage my Jeep?

While the vehicle may still be drivable, ignoring the issue can lead to long-term engine problems, such as increased wear on components or reduced fuel efficiency.

6. How is the P3426 code fixed on a Jeep?

Repairs may include replacing the cylinder 4 deactivation solenoid, cleaning or replacing clogged oil passages, repairing damaged wiring, or updating the ECM software if needed.

7. Can low oil pressure trigger code P3426 on a Jeep?

Yes, low oil pressure can affect the cylinder deactivation system's performance and trigger the P3426 code.

8. Is the P3426 code specific to Jeeps with certain engines?

Yes, this code typically affects Jeeps with engines equipped with cylinder deactivation technology, such as some V8 models.

9. How much does it cost to repair code P3426 on a Jeep?

Repair costs can range from $100 to $500 or more, depending on whether the issue is related to the solenoid, wiring, or other components.

10. Can a dirty oil filter cause the P3426 code on a Jeep?

Yes, a dirty or clogged oil filter can restrict oil flow, leading to insufficient pressure for proper cylinder deactivation operation and triggering the P3426 code.