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Code P3449 Faulty MDS 7 solenoid

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2005 nissan frontier problem code 1757 and 1759


ObdII Code 1757 means the transmission oil could be burned or the oil pan has excessive dirt in it. There could be internal transmission damage. However, other things that throw that code include a faulty Governor Pressure Sensor, a Faulty Governor Pressure Solenoid, a Faulty Valve Body, an engine Control Module (ECM) 5 volt supply, a 5 volt supply circuit could be open, a 5 volt supply circuit could be open inside the transmission, or a - Faulty Engine Control Module (ECM).

On the other hand, a Code 1759 means a possible faulty Front Brake Solenoid Valve, or a front Brake Solenoid Valve harness is open or shorted, or a Front Brake Solenoid Valve circuit with a poor electrical connection.

Apr 15, 2014 | 2005 Nissan Pathfinder

1 Answer

Need help to repair code p0973 on my 2008 chevy impala, what do I need to look for to fix the problem?


P0973 code: Shift solenoid "A" control circuit low.

1. Sensor or solenoid faulty
2. Connector terminal damaged or corroded
3. Wire harness needs to be checked for correct voltage, open, short to ground, or short to voltage
4. Control unit software requires updating
5. Powertrain or ECU faulty
6. Battery voltage low
7. Transmission system malfunction

Could be time to find a competent mechanic!

Oct 31, 2013 | 2008 Chevrolet Impala

1 Answer

2009 pontiac g6 purge valve solenoid


code PO171 fuel trim system lean bank 1 conditions.possible causes air leaks in intake manifold exhaust pipes or exhaust manifold. fuel control sensor is out of calibration such as ECT IAT MAF.fuel component faulty like stopped up fuel filter fuel injectors clogged low fuel pressure faulty fuel pump. HO2S element contaminated or has failed. purge solenoid is part of EVAP system. if you have faulty purge solenoid you would get code like PO443 meaning evaporative emission control system purge control valve circuit malfunction.try replacing fuel filter clean fuel injectors see what happens.

Apr 04, 2013 | 2009 Pontiac G6

1 Answer

2002 dodge durango code p3449 how to fix problem


There is not just one solution, the code indicates a problem in the circuit,not a particular part of it,

Jun 06, 2012 | Dodge Cars & Trucks

1 Answer

PO744 code 2001 infiniti qx4 how do i fix


CODE PO744 AUTOMATIC TRANSMISSION TORQUE CONVERTER CLUTCH SOLENOID VALVE FAULT. POSSIBLE CAUSE FAULTY TCC SOLENOID.CHECK TCC SOLENOID WIRING FOR DAMAGE.OR YOU COULD HAVE FAULTY TCM OR ECM. IF THE TCC SOLENOID IS FAULTY YOUR ENGINE WILL STALL OUT AT A RED LIGHT OR STOP SIGN.YOUR ENGINE WILL STALL OUT AT EVERY STOP THAT WOULD BE SIGN FAULTY TCC SOLENOID.IF ENGINE DONT STALL OUT THE TCC SOLENOID COULD COULD BE STUCK OPEN, IF YOUR TORQUE CONVERTER FAULTY IT WILL CAUSE PREMATURE LOCKUP STALLING OUT THE ENGINE.

Nov 01, 2011 | 2007 Infiniti QX4

1 Answer

On my 2001 rodeo the check engine lite came on and the only code that came up is po440, can you tell me what this is


This alarm concerns the function of the EVAP SYSTEM. This system monitors vacuum correctness. If a sufficient vacuum level cannot be achieved, a large leak or a faulty EVAP canister purge solenoid is indicated. It can be caused for the following reasons:
1) Disconnected or faulty fuel tank pressure sensor
2) Missing or faulty fuel cap
3) Disconnected, damaged, pinched, or blocked EVAP purge line.
4) Disconnected or damaged EVAP vent hose.
5) Disconnected, damaged, pinched, or blocked fuel tank vapor line.
6) Disconnected or faulty EVAP canister purge solenoid.
7) Disconnected or faulty EVAP canister vent solenoid.
8) Damaged EVAP canister.
9) Leaking fuel sender O-ring.
10) Leaking fuel tank or fuel filler neck.

Apr 13, 2011 | 2001 Isuzu Rodeo

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

1 Answer

Flashing D4


yes it will matter that the switch is v tec....AND I WOULD REPLACE THAT SHIFT SOLENOID AS WELL ...THE THROTTLE POSITION USUALLY ISNT THE PROBLEM WITH THIS PARTICULAR MODEL..first the v.s.s and the shift solenoid is most likely the culprit

May 11, 2009 | Honda Accord Cars & Trucks

1 Answer

Unknown part/removal/re-instalation???


these items are plugs to blank off where mds solenoids would be if your hemi had the multi-displacement system(mds)..you may break them taking them out..check with dodge dealer to see if new ones available

Mar 16, 2009 | 2004 Dodge Durango

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