Question about 1999 Cadillac DeVille

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Torque converter solenoid stuck off DTC

My service engine light comes back Torque converter solenoid system stuck off. Seems to drive fine. Shifts into all gears...Just tired of looking at the light for the past year... any ideas how to fix this problem??? i have 145k miles....

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  • Anonymous Nov 21, 2008

    service engine light comes on, i was told it was a 741 code torque conveter stuck off, i need to find out how much it costs to repair. help is much appreciated, by the way the car is a 2002 deville with 123,000 miles. thank you for the help.



    r.l

  • Anonymous Dec 03, 2008

    I have the same problem with my 1999 DeVille. Dealer wanted to take out the transmission and repair it, for about $2000-to $2500. Car runs well, but I have noticed a drop in mileage. Is it necessary to repair? From other comments, I get the feeling that it's probably not worth it on a ten year old car. What say you? tom

  • Anonymous Jan 19, 2009

    I have the same problem. do I need to buy torque converter on relay. price?

  • jima1965
    jima1965 Feb 01, 2013

    96 DEVILLE IN EXCELLENT LOW MILEAGE CONDITION IS WORTH $2200. I RECOMMEND BUYING A USED TRANS OVER 100 K MILES BECAUSE OF ALL THE PROBLEMS THESE TRANNYS HAVE(4 INTERNAL SMOG FAIL SENSORS/ MISC SEALS AND SOLENOIDS THAT CAN KILL THE CAR) USED TRANS ABOUT $600 ONLINE. OVERHAUL IS ABOUT $2500 + INSTALL LABOR AND SAME 1 YEAR GUARANTEE AND THE CAR'S NOT WORTH I.

  • Anonymous Mar 16, 2014

    no drive engine runs fine but will not pull in gear engine code came up shift solenoid f.

  • Anonymous Mar 18, 2014

    They told me that it was the torque converted. The escalade drives fine. Do you think is could be low transmission fluid?

  • Anonymous Mar 18, 2014

    new trany gear indicater will not go past N

  • Anonymous Mar 25, 2014

    WEN A START THA VAN END PUT IT IN DRIVE I RUN FOR 2OR3 MINUTES THEN STAP FOR 2MINUTES END RUN OR ANOTHER 2OR3 MINUTES AGUIEN

  • Anonymous Mar 29, 2014

    where is this part located so it can be replace
    Is it inside the transmission or located near the engine

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There is a solenoid switch that locks up your torque converter to get a 1:1 input for your transmission. This solenoid (or less likely its circuit) does not operate. You probably don't feel the difference in driveability but this definitely affects fuel mileage of the car... The solenoid for your particular application is available for about 60$ Canadian at NAPA auto parts here in Canada. Not too sure about USD$ and labour costs...

Posted on Aug 13, 2008

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Where could i get a picture of where the switch is located?

Posted on Apr 14, 2010

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2 Answers

2011 dodge grand caravan engine malfunction light keeps coming on. Dealer traced it to a bad battery, had a new one installed and codes disappeared. Now light is back on. Codes P0740/P0562 show up


P0740 torque converter malfunction
Possible causes
Low or dirty transmission fluid
Faulty torque converter clutch solenoid valve
Torque converter clutch solenoid valve harness is open or shorted
Torque converter clutch solenoid valve circuit poor electrical connection

P0562 charging system voltage low
Possible causes
Low battery charge
Defective battery
Faulty alternator
Problem with belt
Open or shorted system voltage circuit

Jul 04, 2016 | 2011 Dodge Grand Caravan

1 Answer

'98 Pontiac Grand Prix SE PO742 torque converter clutch solenoid circuit stuck on Trac off light and service engine soon light stay on


When the PCM detects 3 occurrences of TCC slip between -20 and +50 RPM for 5 seconds, indicating the TCC is applied, when commanded OFF, then DTC P0742 sets. DTC P0742 is a type B DTC.
The PCM energizes the Torque Converter Clutch Solenoid Valve Assembly (TCC Sol. Valve Assy.) by creating a ground path on circuit 422. When grounded (energized), the valve stops converter signal oil from exhausting. This causes converter signal oil pressure to increase and move the TCC apply valve. The TCC Sol. Valve Assy. de-energizes when the PCM no longer provides a ground path. When de-energized, the valve will exhaust fluid and release the TCC
Diagnostic Aids
?€¢
Check for PRNDL DTC P0705. DTC P0705 affects transmission operation. This may set DTC P0742 falsely.


?€¢
Inspect the transmission fluid for debris.


DTC P0742 Torque Converter Clutch System Stuck ON Step
Action
Value(s)
Yes
No

1
Was the Powertrain On-Board Diagnostic (OBD) System Check performed?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

2
Install the Scan Tool .
With the engine OFF, turn the ignition switch to the RUN position.
Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. Record the DTC Freeze Frame and Failure Records, then clear the DTC.
Start and run the vehicle.
Select TCC Slip Speed on the scan tool.
With the transmission in D4, drive the vehicle through the 1-2 upshift.
In second gear is the TCC Slip Speed within the range specified?
-20 to +50 RPM
Go to Step 3
Go to Diagnostic Aids

3
Inspect for the following conditions:
The TCC apply valve stuck ON because of sediment or damage.
The TCC Sol. Valve Assy. stuck ON because of sediment or damage. Refer to Control Valve Body Assembly Inspection, in Unit Repair.
Was a condition found and corrected?
--
Go to Step 4
--

4
In order to verify your repair, perform the following procedure:
Using the scan tool, clear DTCs.
Operate the vehicle under the following conditions:
• The gear range is D2, D3 or D4.
• The commanded gear is not 1st.
• The engine speed is greater than 500 RPM for 5 seconds.
• Not in fuel shut off.
• The engine torque is 95-270 N·m (70-200 lb ft).
• The throttle position is 14-50%.
• The PCM commands the TCC OFF.
• The TCC slip speed is 150-2000 RPM for 5 seconds.
• The engine speed is 800-4000 RPM.
• The vehicle speed is 32-112 km/h (20-70 mph).
• The speed ratio is 0.65-1.18.
• The last gear change occurred more than 3 seconds ago.
Select Specific DTC. Enter DTC P0742.
Has the test run and passed?
--
System OK
Begin the diagnosis again. Go to Step 1

Oct 07, 2015 | Pontiac Cars & Trucks

2 Answers

Where is the torque converter clutch solenoid located P0744


troubleshooting?
  • cvt re0f10a
p0744 torque converter

description
this malfunction is detected when the torque converter clutch does not lock-up as instructed by the tcm. this is not only caused by electrical malfunction (circuits open or shorted), but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.

dtc logic

dtc detection logic
159975295

dtc confirmation procedure

caution:
always drive vehicle at a safe speed.

note:
if "dtc confirmation procedure" has been previously performed, always turn ignition switch off.
then wait at least 10 seconds before performing the next test.
1.check dtc detection
with consult-iii
  1. turn ignition switch on.
  2. select "data monitor".
  3. start engine and maintain the following condition for at least 30 seconds.
159894994

with gst
follow the procedure "with consult-iii".
is "p0744" detected?
yes - go to see: cvt re0f10a.
no - check intermittent incident. refer to see: testing and inspection\initial inspection and diagnostic overview\intermittent incident.

diagnosis procedure
1.check line pressure
perform line pressure test. refer to see: transmission and drivetrain\continuously variable transmission/transaxle\testing and inspection\initial inspection and diagnostic overview\cvt re0f10a.
is the inspection result normal?
yes - go to 2.
no - repair or replace damaged parts.
2.check torque converter clutch solenoid valve
  1. turn ignition switch off.
  2. disconnect cvt unit connector.
  3. check torque converter clutch solenoid valve. refer to see: cvt re0f10a. is the inspection result normal?
yes - go to 3.
no - repair or replace damaged parts.
3.check lock-up select solenoid valve
check lock-up select solenoid valve. refer to see: cvt re0f10a.
is the inspection result normal?
yes - go to 4.
no - replace transaxle assembly. refer to see: transmission and drivetrain\continuously variable transmission/transaxle\service and repair\removal and replacement\cvt re0f10a\transaxle assembly\exploded view.
4.check secondary speed sensor system
check secondary speed sensor system. refer to see: p0720\cvt re0f10a.
is the inspection result normal?
yes - go to 5.
no - repair or replace damaged parts.
5.check primary speed sensor system
check primary speed sensor system. refer to see: p0715\cvt re0f10a.
is the inspection result normal?
yes - go to 6.
no - repair or replace damaged parts.
6.detect malfunctioning items
check tcm connector pin terminals for damage or loose connection with harness connector.
is the inspection result normal?
yes - replace tcm. refer to see: powertrain management\transmission control systems\control module, cvt\service and repair\cvt re0f10a\exploded view.
no - repair or replace damaged parts.

component inspection (torque converter clutch solenoid valve)
1.check torque converter clutch solenoid valve
159962448

check resistance between cvt unit terminal 12 and ground.

159975296

is the inspection result normal?
yes - inspection end
no - perform "self-diag results" mode for "transmission".

component inspection (lock-up select solenoid valve)
1.check lock-up select solenoid valve

159962449

check resistance between cvt unit terminal 13 and ground.

159975297

is the inspection result normal?
yes - inspection end
no - replace transaxle assembly. refer to see: transmission and drivetrain\continuously variable transmission/transaxle\service and repair\removal and replacement\cvt re0f10a\transaxle assembly\exploded view.

Jan 21, 2015 | 2010 Nissan Altima 2.5

2 Answers

2005 Chevy Equinox P0742 & P0700 problems. My car engine flares and sometimes doesn't change gears. Anyone know how to fix these issues.


Both codes (obviously) point to transmission related problems. The DTC P0700 means Transaxle Control System Fault Conditions and the DTC P0742 code means Torque Converter Clutch (TCC) - Stuck On.

The DTC P0700 code is for information only and the next step is to check for transaxle codes in the Transaxle Control Module (TCM). So you'll have to have the dealer or another qualified shop/technician pull the transaxle codes from the TCM and go from there.

On DTC P0742, Torque Converter Clutch Solenoid Valve (TCC Sol. Valve) is a normally-open exhaust valve that is used with the Torque Converter Clutch Pulse Width Modulation Solenoid Valve (TCC PWM Sol. Valve) in order to control fluid acting on the converter clutch apply valve. The TCC Sol. Valve attaches to the transmission case assembly extending into the pump cover. When grounded (energized) by the Vehicle Control Module (VCM), the TCC Sol. Valve stops converter signal oil from exhausting. This causes converter signal oil pressure to increase and move the converter clutch apply valve against spring force and into the apply position. In this position, release fluid is open to an exhaust port and converter feed fluid fills the apply fluid circuit. The converter feed fluid applies the TCC. When the VCM no longer provides a ground path, the TCC Sol. Valve de-energizes and apply fluid exhausts, releasing the TCC.

Condition: Some customers may comment that the transmission shifts hard, a shudder/chuggle is felt on deceleration or the Service Engine Soon (SES) light is illuminated.

A technician may find DTC P0742 set. Customers with 4T80E transaxles may also comment on a "bump" feeling at approximately 61-68 km/h (38-42 mph) when they lift and then tip into the throttle. There may also be a concern of whine noise in 3rd or 4th gear with or without the Service Engine Soon light/message displayed and with DTC P0742 set.

Correction:
Note: DO NOT REPLACE THE VALVE BODY AND PUMP ASSEMBLY.

Important: This test is not applicable to the 4T80E transmission. Instead, replace the TCC PWM solenoid on vehicles with a 4T80E transmission using published procedures for the vehicle being serviced.

Perform one of the following diagnostics:
• Test drive the vehicle with the Tech 2® installed, Monitor TCC Release Pressure. The Status will be YES until TCC applies and then the display will read NO. If during acceleration the status remains NO and the upshifts are harsh and during deceleration the vehicle shudders during downshifts, suspect the TCC PWM solenoid.
• With the Tech 2 installed in the vehicle, start the engine. Build the vehicle on the Tech 2®. Apply and firmly hold the service brake. Place the transaxle in D4 and command Drive 3 with the Tech 2®. If the engine stumbles and/or stalls, suspect the TCC PWM solenoid.

Replace the TCC PWM solenoid using published procedures for the vehicle being serviced.

Hope this helps; and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment.

Have a nice day and thanks for using FixYa.
Jose.

Oct 17, 2011 | 2005 Chevrolet Equinox

2 Answers

2004 Kia Optima has 3 check engine lights on for the following codes - 0741, 0455, 1529. Is this safe to ignore, or how soon to have serviced? Car runs fine, except when stopping for lights, then it kind...


HI there i will try to help .
first code P0741= transmission torque converter is stuck in the off bastion .
1. Check your transmission fluid level to see if low or might need replacing.
2.You might have a Faulty torque converter clutch solenoid valve.
3.If you can check Torque converter clutch solenoid valve harness or connectors
4.If you can check Torque converter solenoid valve circuit to see it is open or shorted.
But first check your trans fluid '''

2 codeP0455=evaporative emission system leak detected .
1. check your fuel cap and mack shore it is on tight before replacing .

3.Code P1529= check T C M it might be do to code P0741.
1.Fix first code P0741and P0455 and clear codes and see if code P1529
comes back.

good luck ziggyone

Sep 14, 2011 | 2004 Kia Optima

1 Answer

My 2007 dodge with 5.9 diesel is showing engine malfunction light and error code of P1740, failed TCC or overdrive solenoid. The truck seems to run ok in overdrive but I don't understand what the TCC...


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.

Testing: Check torque converter solenoid for proper operation.

NUMBER: 21-11-00
GROUP: Transmissions
EFFECTIVE DATE: October 02, 2000
SUBJECT: 46RE Transmission MIL Due To DTC P1740 - TCC or OD Solenoid Performance
OVERVIEW: This bulletin involves the replacement of the transmission pressure boost valve cover plate.
MODELS: 2000 - 2001 (AB) Ram Van 2000 - 2001 (AN) Dakota 2000 - 2001 (BR/BE) Ram Truck 2000 - 2001 (DN) Durango

NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 46RE TRANSMISSION BUILT BEFORE AUGUST 01, 2000 (MDH O8O1XX).

SYMPTOM/CONDITION:
The customer may complain of a Malfunction Indicator Lamp (MIL) illumination. Upon further analysis, it is determined that the MIL is caused by Diagnostic Trouble Code (DTC) P1740 - Torque Converter Clutch (TCC) or overdrive solenoid Performance. Other than the MIL, the customer may not notice any other condition with the transmission.

This condition may be caused by an intermittent and momentary TCC disengagement condition. The transmission valve body pressure boost valve cover plate has been revised with a larger size orifice hole to address this condition.

NOTE: THE DRB III(R) MUST BE OPERATING AT RELEASE LEVEL 50.4 MDS2 SYSTEM CIS CD2067 OR HIGHER (AVAILABLE THE WEEK OF OCTOBER 2, 2000) IN ORDER TO PERFORM THE REVISED TORQUE CONVERTER CLUTCH STALL TEST. DO NOT USE EARLIER VERSION STALL TEST TO DETERMINE CONDITION OF THE TORQUE CONVERTER CLUTCH.

Here can find the test in pdf format: 2009-11-28_034958_1124.pdf

Hope helps.

Apr 28, 2011 | Dodge Ram 3500 Cars & Trucks

1 Answer

1998 jeep grand cherokee 4x4. have the p0740 code. have to start from neutral, then shifts faily well. May start fluttering and making noise, have to put back to N, then to D and once again will shift. ...


P0740 JEEP - Torque Converter Clutch Circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission shift shock
- Vehicle may not shift into the highest gear

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted

When is the code detected?
Torque Converter Clutch (TCC) unlocked for 10 sec., ECM commands converter lock-up and did not record engine speed drop.

P0740 JEEP Description
The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.

Lock-up operation, however, is prohibited when A/T fluid temperature is too low.

When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

Mar 27, 2011 | 1998 Jeep Cherokee 4WD

3 Answers

1999 Buick Park Ave Ultra Service Engine Light Code #P0742


The code PO742 indicates the torque converter clutch is stuck on.
The torque converter is what connects the engine to the transmission.
It engages and disengages according to signals from the pcm, to aid in
smooth shifting. There are a couple of things you can try. make sure trans. fluid is full, if thats ok check the 20 pin connector, located on left
side of car on top of transmission bell housing. Make sure there's no
corrosion or bent pins. If this clears the code your all set, if not you may
want to ask your mechanic and see what he/she recomends.
Hope this helps.
Good luck

Jan 19, 2010 | 1999 Buick Park Avenue

2 Answers

Wondering what the TCC fault code is


Here are the DTC's for the TCC Solenoid:

DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0741 TCC System Stuck Off
DTC P0742 TCC System Stuck On
DTC P0743 TCC Enable Solenoid Circuit Electrical
DTC P0744 Torque Converter Clutch Circuit Intermittent

-KC GTO Dad

Sep 17, 2009 | 2002 Pontiac Grand Prix

1 Answer

2001 ESPACE 2.0L AUTO NO REVERSE HELP PLEASE


your trans has lectronic controls to operate the shifting of your trans. If there is a defect, a fault code will be stored in the computer, called a DTC. You need to have someone with a scan tool check for the fault code. It is likely a solenoid that is not working or stuck.

Get the codes first. Autozone can run the test for free on engines, maybe trans codes too. Call your local Autozone or big parts store and ask them.

----------
SECTION 307-01: Automatic Transaxle/Transmission 2001 Escape Workshop Manual
DESCRIPTION AND OPERATION Transaxle Description The CD4E automatic transaxle is a four-speed, front wheel drive automatic transaxle with electronic controls for:
  • Electronic pressure control (EPC) solenoid for shift quality.
  • Shift scheduling.
  • 3-2 shift timing.
  • Coast braking.
  • Torque converter clutch control.
The transaxle features a four element torque converter with a torque clutch and a geartrain that includes:
  • Compound planetary gearset.
  • Chain drive.
  • Planetary gearset final drive.
  • Pinion and side gear differential.
The hydraulic control system of the transaxle has five solenoids that control:
  • Shift feel, through line pressure control.
  • Shift scheduling, through shift valve positioning control.
  • Modulated application of the torque converter clutch.
  • Timing of 3-2 shifts.
  • Engine braking during coast operation.
----------------------------
Solenoid Valve Body Assembly The solenoid valve body assembly contains the transmission fluid temperature sensor (TFT) sensor, as well as five PCM controlled output devices:
  • Electronic pressure control (EPC) solenoid.
  • Shift solenoid A (SSA).
  • Shift solenoid B (SSB).
  • 3-2 timing/coast clutch solenoid (3-2 T/CCS).
  • Torque converter clutch (TCC) solenoid.
---------------------------------
You may need your PCM, Powertrain Control Module reflashed by a Ford Dealer.
Try disconnecting your battery for 1/2 hour and then reconnect and see what happens. It will run a little rough and shfit hard until it relearns your engine/trans characteristics.
Let us know results of tests and DTC codes if you get them.

May 04, 2009 | Renault Sportwagon Cars & Trucks

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