Question about 1996 Lexus LS 400

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I have a codeP0770, Def :shift solenoid "E" malfunction Prob cause: shift solenoid stuck open, block oil passage

Check engine light is on

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  • 410 Answers

Try having the transmission fluid completely flushed using a machine designed to do this, a lot of times the shift solenoid gets clogged with small particles due to contaminated transmission fluid, it's seldom the solenoid itself, flushing the fluid including the converter may open the oil passage so the solenoid can function correctly.

Posted on May 29, 2014

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ZJLimited
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SOURCE: I failed the emission test

A code P0300 may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Hope helps.

Posted on Apr 19, 2011

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3 Answers

Nissan maxima code po780 2005


code p 0780 refers to gear selection--shift malfunction===causes --wiring --TR( transmission range) sensor--shift solenoids ---transmission mechanical fault
take it to an accredited auto transmission specialist shop for an exact diagnosis of the fault
I seriously doubt that you have a transmission box mechanical fault so get a second opinion if a replacement transmission is suggested

Sep 09, 2016 | Nissan Maxima Cars & Trucks

1 Answer

Truck wont shift outta 1st gear


Is the check engine light on ? . What transmission 4L80E / 4L85-E or 4L60-E / 4L65-E
1st Gear Range Only - No Upshift Checks
Causes

Control Valve Body (60)
• The 1-2 Shift valve is sticking
• The spacer plate or gaskets are mispositioned or damaged

Case (103)
The case to valve body face is damaged or is not flat

Shift Solenoid Valves (366/368)
• Stuck or damaged
• Faulty electrical connection

2-4 Servo Assembly (13-28)
• The apply passage case is restricted or blocked
• Nicks or burrs on the servo pin or on the pin bore in the case
• Fourth servo piston is installed backwards

2-4 Band Assembly (602)
• The 2-4 band is worn or damaged
• The band anchor pin is not engaged

Nov 19, 2015 | 2003 GMC Sierra 1500

1 Answer

My 04 Yukon is not shifting properly out of first gear. Check engine light is on and the code that came up is P0752. Stated that a shift solenoid is stuck. What is a shift solenoid.


A shift solenoid is just that an electric solenoids that opens and closes hydraulic fluid passages that shift the transmission, If you have never had the fluid and filter replaced in the truck do so, dirt may be the cause here and often a fluid change and driving it awhile fixes the problem,

Nov 09, 2012 | 2004 GMC Yukon

1 Answer

My honda accord 2003 V6 hiccups when I step on the gas, and the right signals do not work. The code P1259 came up and I was wondering excatly what does that mean?


This is an error code related to VTEC related Honda engines. I am sending you a little reading on that error code.. Best of Luck..


The Check Engine Light (CEL) is on. Trouble code P1259. Tests/Procedures: 1. Locate the Variable Timing/Lift Control (VTEC) pressure switch, on the back of the cylinder block, by the oil filter.

2. The VTEC oil switch is normally closed and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire.

3. At approximately 4000 RPM, and when driving the vehicle, the VTEC system should turn on. To turn the system on, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the ECM can verify that VTEC did turn on correctly.

4. The code will set below 4000 RPM if the reference voltage is not grounded. The code will set above 4000 RPM if the VTEC oil switch does not open.

5. If the code sets at 4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly. Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid
Tech Tips: When the P1259 code sets at 4,000 RPM or higher, always verify that the engine oil level is full. Also, if there is an oil pressure or volume problem, always verify that the oil pan is not pushed up and is too close to the oil pickup tube, causing an oil volume problem. Be very careful when supporting the engine with the oil pan.

Aug 26, 2011 | Honda Accord Cars & Trucks

1 Answer

O/d light blinks when driveing o/d seems to be engaged car has 198000 miles and runs very good also engine light is on


O/D light blinks, but with that the check engine light is ON.--- This will make your troubleshooting easier.When the check engine light comes on, and remains on, this indicates that there is error stored in your cars computer.---- Once the computer is scanned, you will get error codes, as per that error code it will point towards faulty part, which is causing the O/D light to blink.-------- Most probably the O/D light blinks, If a problem exists in No. 1 or No. 2 solenoids or speed sensors .
--------------- For car after 1995 it requires OBD2 tool and for car before 1995 it requires OBD1 tool.------- --------- You car will require OBD1 tool.There are very few auto parts store and repair centers who have OBD1 tool.In your case you required OBD1 tool.------ You can just contact local auto-parts store and they will guide you to the nearest store who has OBD1 tool.There you can get your car scanned.If there is error set in your cars computer, then you will receive the error code.As per error code it will point towards the faulty part causing this problem in your car.------------- -------------- The codes which you get is scanning will be mostly any of this following codes:--- DTC P0500 - Vehicle Speed Sensor Malfunction
. DTC P0750 - Shift Solenoid "A" Malfunction
. DTC P0753 - Shift Solenoid "A" Electrical Malfunction
. DTC P0755 - Shift Solenoid "B" Malfunction
. DTC P0758 - Shift Solenoid "B" Electrical Malfunction
. DTC P0770 - Shift Solenoid "E" (SL) Malfunction
. DTC P0773 - Shift Solenoid "E" (SL) Electrical Malfunction
. DTC P1520 - Stop Light Switch Signal Malfunction
. DTC P1705 - Direct Clutch Speed Sensor Circuit Malfunction
. DTC P1765 - Shift Solenoid Valve SLN Circuit Malfunction
. DTC P1780 - Park/Neutral Position Switch Malfunction
--------------- Now it all depends on what code you get, as per that you can replace the following part.------- This will help.Thanks.Helpmech.

Jul 07, 2011 | 1995 Toyota Camry

3 Answers

CODE P0755 ON TOYOTA CAMRY DX


DTC P0755 - Shift solenoid valve B
This warning is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.

The P0755 code is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission will not shift gears.

Possible causes:
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid B valve
- Shift solenoid B valve harness or connectors
- Shift solenoid B valve circuit is open or shorted

When the a transmission solenoid is malfunction, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.

Additional test details could find in this link about Repair/05/2011ne09/cip0755 (pdf)

Hope this helps (remember to rate and comment this answer).

Jul 05, 2011 | 1996 Toyota Camry

1 Answer

My c6 in bronco starts off in 2nd gear performs ok every other way.


P0700 Transm.Contr.System Malfunction 17084
P0702 Transm.Contr.System Electrical 17086
P0703 Torque Converter/Brake Switch B Circ Malfunction 17087
P0705 Transm.Range Sensor Circ.(PRNDL Inp.) Malfunction 17089
P0706 Transm.Range Sensor Circ Range/Performance 17090
P0707 Transm.Range Sensor Circ Low Input 17091
P0708 Transm.Range Sensor Circ High Input 17092
P0710 Transm.Fluid Temp.Sensor Circ. Malfunction 17094
P0711 Transm.Fluid Temp.Sensor Circ. Range/Performance 17095
P0712 Transm.Fluid Temp.Sensor Circ. Low Input 17096
P0713 Transm.Fluid Temp.Sensor Circ. High Input 17097
P0715 Input Turbine/Speed Sensor Circ. Malfunction 17099
P0716 Input Turbine/Speed Sensor Circ. Range/Performance 17100
P0717 Input Turbine/Speed Sensor Circ. No Signal 17101
P0721 Output Speed Sensor Circ Range/Performance 17105
P0722 Output Speed Sensor Circ No Signal 17106
P0725 Engine Speed Inp.Circ. Malfunction 17109
P0726 Engine Speed Inp.Circ. Range/Performance 17110
P0727 Engine Speed Inp.Circ. No Signal 17111
P0730 Gear Incorrect Ratio 17114
P0731 Gear 1 Incorrect Ratio 17115
P0732 Gear 2 Incorrect Ratio 17116
P0733 Gear 3 Incorrect Ratio 17117
P0734 Gear 4 Incorrect Ratio 17118
P0735 Gear 5 Incorrect Ratio 17119
P0740 Torque Converter Clutch Circ Malfunction 17124
P0741 Torque Converter Clutch Circ Performance or Stuck Off 17125
P0748 Pressure Contr.Solenoid Electrical 17132
P0750 Shift Solenoid A malfunction 17134
P0751 Shift Solenoid A Performance or Stuck Off 17135
P0752 Shift Solenoid A Stuck On 17136
P0753 Shift Solenoid A Electrical 17137
P0756 Shift Solenoid B Performance or Stuck Off 17140
P0757 Shift Solenoid B Stuck On 17141
P0758 Shift Solenoid B Electrical 17142
P0761 Shift Solenoid C Performance or Stuck Off 17145
P0762 Shift Solenoid C Stuck On 17146
P0763 Shift Solenoid C Electrical 17147
P0768 Shift Solenoid D Electrical 17152
P0773 Shift Solenoid E Electrical 17157
P0790 Normal/Performance Switch Circ Malfunction 17174

Dec 20, 2010 | 1985 Ford Bronco

1 Answer

Please,can you help me fix cods problems p0732,p0734 on my 2006 Mazda Tribute


P0732 - Improper Ratio for Second Gear.
P0734 - Improper Ratio for Fourth Gear.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM as follows:

Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from ECM C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd and 4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

This malfunction will be caused when shift solenoid valve B is stuck open.

Gear positions supposed by TCM are as follows. In case of gear position with no malfunctions: 1 , 2, 3 and 4 positions In case of gear position with shift solenoid valve B stuck open: 4* , 3, 3 and 4 positions to each gear position above.

Symptoms: Engine Light ON (or Service Engine Soon Warning Light)

Diagnostic trouble code A/T 2ND GR FNCTN with CONSULT-II or P0732 without CONSULT-II is detected when A/T cannot be shifted to the 2nd gear position even if electrical circuit is good.

Possible Causes:
- Shift solenoid valve B
- Each clutch
- Hydraulic control circuit


Check it and tell us news.

Nov 23, 2010 | Mazda Tribute 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

1 Answer

I have a Honda 2004 CRV - the repair ( OBD II) code is P2647 - what does that mean?


P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid

Jul 13, 2009 | 2004 Honda CR-V

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