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P0742 tcc stuck on - 2002 Chevrolet Cavalier Coupe

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While driving my car over drive light comes on in a few min. the car dies


Does it die at stops or with foot off throttle and coasting? The overdrive light coming on like that is the transmissions equivalent of the engine check engine light. Fault has been detected and code stored. Would suspect with information provided that the torque converter clutch is locking up but not releasing. You may be able to have this code retrieved with an OBD2 scan tool or at local parts store. You are looking for codes in the 700 range as these are all transmission related codes. ie P0741 or P0742. The P0742 is for torque converter clutch stuck on. P0741 is TCC stuck off

Oct 24, 2015 | 2000 Mazda Protege

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

Having a problem with my p0742 will I need a new transmission?


How would some know that?

I assume you haven't even had it road tested yet
by a trans or repair shop

There are no new transmissions,only new when the
car is assembled

Nov 26, 2012 | 2001 Chevrolet Monte Carlo

1 Answer

Code PO420A, PO742A,P1811C


P0420 catalytic below threshold,Your basically dealing with is a failed catalytic ,
P0742 Torque convertor clutch circuit stuck on or off.
P1811 this is manufacutrer code definition adaptive shift (due to P0742)
P1811 this code is set from towing a trailer in overdrive
when P0742 comes on it usually is accompanied by P1887
If its p1811 then yes it truly is a TCC solenoid being a problem As for catalytic code te catalytic is a mechanical device and yes they do expire from mileage and age

Mar 07, 2012 | 2002 Buick LeSabre

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

1 Answer

Hi! I am not a good of speaker english, sorry.. I have Daewoo Nubira 2001 motor T20SED, transmision 4T40E and i have the problem : after driving at 100 km/h light ON Check Engine - error clutch torque...


Do you have the error code (P0742 = torque converter clutch stuck on...locked and P0741 TCC stuck off). The TCC solenoid replacement for the 4T40E (and 4T45E) is not very expensive but the job of getting the transmission case out from the car is difficult. Unless you have experience of fixing transmissions this is best left to an expert.

Jul 25, 2011 | 1999 Daewoo Nubira

2 Answers

Does not shift ,engine makes whining,rattling sound diagnostic code:0742 displays allfluid levels are topped off,oil,tranny,powersteering,radiator


it doesnt matter if the fluids are topped off?????????????? you need a tcc switch

Circuit Description
The TCC release switch is part of the automatic transmission fluid pressure (TFP) manual valve position switch. The TFP manual valve position switch is mounted to the transmission valve body.
The TCC release switch is a normally-closed switch. When the TCC is released, TCC release fluid pressure opens the TCC release switch which opens the TCC release pressure circuit. When the voltage on the circuit is high, switch open, the PCM recognizes that the TCC is no longer engaged.

If the PCM detects that the TCC release switch is closed when the TCC is commanded OFF, then DTC P0742 sets. DTC P0742 is a type B DTC.

DTC Descriptor
This diagnostic procedure supports the following DTC:

DTC P0742 Torque Converter Clutch (TCC) System - Stuck On

Conditions for Running the DTC
  • No TCC release switch DTC P1887.
  • No TCC PWM solenoid valve DTC P2761.
  • The engine speed is greater than 500 RPM for 5 seconds and not in fuel cut off.
  • The engine torque is 95 - 270 Nm (70 - 200 ft. lbs.) .
  • The TP indicated angle is 5-45 percent.
  • The transmission fluid temperature is between 20°C (68°F) and 130°C (266°F) .
  • The TCC is commanded OFF.
Conditions for Setting the DTC
The TCC release switch is closed 6 times for 4 seconds each, during one trip.

Action Taken When the DTC Sets

  • The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the conditions for setting the DTC are met.
  • The PCM commands maximum line pressure.
  • The PCM commands the TCC ON at maximum capacity.
  • The PCM freezes transmission adaptive functions.
  • The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
  • The PCM stores DTC P0742 in PCM history.
Conditions for Clearing the MIL/DTC

  • The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
  • A scan tool can clear the MIL/DTC.
  • The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
  • The PCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the PCM.
Diagnostic Aids

Test Description
The numbers below refer to the step numbers on the diagnostic table.

  1. A Yes answer indicates that the TCC release switch is functioning properly.
  1. With the 20-way connector disconnected, the PCM should interpret the open circuit as TCC release pressure present.
  2. The TCC release switch is a normally closed switch and must be disconnected to properly test for a short to ground condition. An open condition in the TCC release circuit or switch would set DTC P1887. Open circuits are not diagnosed in DTC P0742.
  1. This step tests for a mechanical or hydraulic condition that would cause the TCC to be stuck ON.
' var HIGHmap133785047 = '' // --> Step 1 - Step 7

Mar 07, 2010 | 2006 Chevrolet Uplander

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

Would a P0742 TCC open code cuase no engagement in


The car most likely needs a new TCC solenoid. These were a common failure in G.M. cars causing the symptoms you were describing. Other symptoms may include: shudder or stalling at stops, car lugging on acceleration, harsh shifts, etc. Car may feel like stuck in second gear on stopping and taking off from stop. I hope this helps.

May 13, 2009 | 1999 Oldsmobile Intrigue

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