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P3400 CHECK ENGINE CODE P3400

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3 Answers

Codepo300andcodep3400


P0300 is a misfire on any cylinder and P3400 is variable valve timing deactivation error. You did not post the make model and year but the 3400 would cause the 300.

Aug 08, 2016 | Cars & Trucks

2 Answers

What do I need to fix code P3400


Try doing an oil change if you havent already. Make sure that you use the right type of oil. The wrong oil viscosity can cause your truck to set tye p3400 code

Jan 09, 2015 | 2006 Dodge Ram 1500

1 Answer

What is code P3400?


Cylinder deactivation is what the code stands for

Jan 09, 2015 | 2006 Dodge Ram 1500

1 Answer

What is code p1414 on Dodge ram hemi engine


ok code p1414 is a secondary air injection system monitor circuit high voltage air pump short, code p3400 is a faulty cylinder deactivation solenoid,it could be a fault in the harness or poor electrical connection

Jul 15, 2014 | 2005 Dodge Ram 1500

1 Answer

I have codes p0521, p3400 on my 2007 chevy Tahoe 5.3. What can I do to find and fix these problems?


http://www.yellowbullet.com/forum/showthread.php?t=266916

Your computer is telling you that there is a problem with oil pressure (p0521). The oil pressure has to be correct to operate the cylinder deactivation system(P3400).

Is the oil level correct? There is a valve lifter oil filter that may need replacement.

Jan 03, 2011 | Chevrolet Tahoe Cars & Trucks

1 Answer

2006 Jeep Commander , Hemi Engine V-8 Engine error codes: P3400 P3497 P1521


P3400
P3400 Cylinder Deactivation System



P3497
P3497 Cylinder Deactivation System

P1521
This code indicates wrong oil used. This could mean either the wrong oil was put in at you last oil change, your engine was operating under high ambient temperatures

Nov 21, 2010 | Jeep Commander Cars & Trucks

1 Answer

P3400 - What is the corrective action to take?


DTC P3400 - Cylinder Deactivation System

It most certainly is not normal for one cylinder to shut off. I would think it would have to be one of the MDS cylinders, which are 1, 4, 6, or 7. Here is what he shop manual says about DTC, P3400. In any case, you're still under waranty, so I'd let the dealer worry about it. If it is a solenoid problem, the intake manifold has to come off. In any case, it shouldn't require a major engine teardown. Let us know what they find.

P3400-MDS RATIONALITY BANK 1
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
When all criteria has been met, power is supplied to each MDS Solenoid when the 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 lifters that
coincide with each particular solenoid. The oil pressure pushes in the locking pins that allows the lifter to collapse,
decoupling the valves and camshaft.
² When Monitored:
Transition from 4 to 8cylinder mode.
² Set Condition:
O2 sensor readings on Bank 1 side indicate a lean condition while in 4 cylinder mode.
Possible Causes
INSUFFICIENT OIL PRESSURE ACTING ON THE LIFTER LOCKING PINS
OIL PASSAGES RESTRICTED
LIFTER
MDS SOLENOID
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1. ACTIVE DTC
NOTE: Diagnose any Deactivation or Oil Pressure DTCs before continuing with this test.
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes >> Go To 2
No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2. MDS SOLENOID 1
Turn the ignition off.
Remove the Intake Manifold per Service Information.
Turn the ignition on.
With the scan tool actuate the MDS Solenoid 1.
Can you feel and hear the Solenoid Actuating?
Yes >> Go To 3
No >> Remove the Solenoid and check for any debris that may be blocking the oil passages to the Solenoid.
If the passages are clogged, clean the passages and replace the MDS Solenoid 1. If the passages are
not clogged with debris, replace the MDS Solenoid 1.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
LX ENGINE ELECTRICAL DIAGNOSTICS 9 - 915
3. MDS SOLENOID 7
With the scan tool actuate the MDS Solenoid 7.
Can you feel and hear the Solenoid Actuating?
Yes >> Go To 4
No >> Remove the Solenoid and check for any debris that may be blocking the oil passages to the Solenoid.
If the passages are restricted, clean the passages and replace the MDS Solenoid 7. If the passages are
not clogged with debris, replace the MDS Solenoid 7.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
4. OIL PASSAGES RESTRICTED
Turn the ignition off.
Remove both Solenoids on Bank 1 of the engine block.
Remove the Bank 1 Cylinder Head per Service Information.
Remove the Lifters from the left engine bank.
Inspect the oil passages to the Solenoids and from the Solenoids to the lifters.
Are the passages blocked?
Yes >> Clean the oil passages as necessary. If the entire engine is restricted disassembly of the entire engine
block may be necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No >> Replace both sets of lifters if no other possible causes remain.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE

Hope helps.

Aug 10, 2010 | 2001 Jaguar S-Type

2 Answers

Cylinder misfire


What is a code p3400

Dec 28, 2008 | 2006 Dodge Ram 1500

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