AutoCodes – Chrysler – P3400 Chrysler

P3400 Chrysler Code - Multiple Displacement System Rationality Bank 1

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
P3400 Chrysler indicates Multiple Displacement System Rationality Bank 1.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 17,965
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 04, 2019
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Code P3400 Chrysler 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 P3400 Chrysler - Multiple Displacement System Rationality Bank 1 - AutoCodes.com
P3400 Chrysler Code - Multiple Displacement System Rationality Bank 1

What are the Possible Causes of the DTC P3400 Chrysler?

  • 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 P3400 Chrysler?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P3400 Chrysler 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.

Need more information about the P3400 Chrysler code?

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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 P3400 Chrysler Code

No Frequently Asked Questions about P3400 Chrysler Code found.

Discuss the causes and fixes for P3400 Chrysler OBDII Code

  • went to A.Z. to look up code p3400. cylider deativation system bank 1 came up asking to replace Multi Displacement system solenoid......AZ cant find anything like that.... what to do where to go

  • What model and year is your Chrysler?

  • 2005 300c 5.7 Himi

  • Try "Valve Deactivation Solenoid" Before replacing the solenoid, make sure the oil level and condition is OK.

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