Question about 2000 Buick LeSabre

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Tcc solenoid code

I have an engine code issue with my 2000 Buick LeSabre. the engine code stated a tcc solenoid is shorted or failed. i need to know how difficult this part is to replace for the novice "backyard mechanic?"

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  • Anonymous Mar 20, 2014

    need to know how to install tcc solenoid

  • Anonymous Mar 21, 2014

    need to change a tcc

  • Anonymous Mar 25, 2014

    tcc code what could go wrong if I buy a car with this code?

  • Anonymous Mar 31, 2014

    hesitates when driving took it to the shop and this is the code that they got P1860A T C C Pulse width modulation solenoid circuit. just wondering how much something like this would cost to fix

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  • Contributor
  • 34 Answers

I don,t reccommend doing this your self as the k-frame will need dropped and the trans case will need split to access the solenoid also when I have to do this I will not do it on the ground I use a lift or I dont do it.
Jim

Posted on Oct 06, 2008

It doeas work

Posted on Oct 06, 2008

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This is a transmission issue, TCC is Torque Converter Control, the solenoid is inside the trans, unless you are a well versed technician I would leave this to the transmission experts, you might try premium assistance for someone that can provide more detailed step by step repair procedures if you are determined to do the repair yourself.

Posted on Oct 06, 2008

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Trouble Code: P0743

TCC Solenoid Circuit Malfunction
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TCC solenoid control circuit is open. TCC solenoid control circuit is shorted to ground. TCC solenoid wiring harness connector is damaged. TCC solenoid is damaged or it has failed. PCM has failed.Trouble Code: P0755

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How to fix 98 buick lesabre code po742


Hi, The PO742 is a transmission code representing the Torque Converter Clutch (TCC) release switch. To throw this code, there is either an electrical, mechanical, or hydraulic issue.

If you are extremely mechanically inclined, you will need to check the TCC solenoid, verify the connections of internal wiring harness, and perform an overall diagnosis of the transmission's condition, which will require removal of the transmission.

Given that you have a 4T65-E Transmission I would highly recommend taking it to a good transmission shop, this is not a 'quick' fix issue. Good luck and Godspeed.

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Code p0753 for a dodge ram 2500 360 m


Both fault codes refer at Tnasmission problem...

P0743 - Torque Converter Circuit Electrical
This DTC appears when an open or shorted condition is detected in the TCC (Torque Converter Clutch) solenoid control circuit; check this as possible causes:
- fused ignition switch output circuit open
- torque converter clutch solenoid defective
- TCC solenoid circuit w/h intermittent defect
- TCCsolenoid circuit w/h observable defect
- TCC solenoid control circuit open
- TCC solenoid control circuit short to ground
- PCM defective (TCC solenoid control circuit)

You will need remove the cover/pan to inspect the harness that goes to all the solonoids and then to inspect the valvebody and the TCC solonoid itself. If you have a multimeter then you could ohm through the harness and even the solonoid. I have found that most of the time this code was produced because of the solonoid itself. But it could be the circuits to it also. There is abig connector an top of the trans that goes into the trans and the internal harness ispect that connector for any corrosion or damaged pins or wires.


P0753 - Shift Solenoid A Electrical Malfunction
This is a common repair that I have replaced several of the solenoid but it is not a cronic problem. It be the wire going to the solenoid shorted so make sure that is check before the transmission is tilted down and the side cover removed. 90% it is just the solenoid; the solenoid is located in the side pan of the tranmission. It would mean lowering the cradle(what the engine and transmission sit on) and lowering the transmission down about one to two feet. Check this like a possible cause:
- 1-2 shift solenoid control circuit is open or shorted to ground
- 1-2 shift solenoid control circuit is shorted to voltage
- 1-2 shift solenoid has failed
- PCM has failed

You will need to remove the transmission pan and its the solenoid with the red and light green wires going to it. Let us know if you have questions contact us here.

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 about this answer. Thank you for using FixYa.

Jose.






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1 Answer

Service engine soon light came on read p0472 torque converter circut stuck on what part do i need


you probably have a open or shorted tcc solenoid in the transmission.

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1998 buick lesabre custome obdII test type code is p1860 what is this?


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Repair info on OSD Fault Code: PO743


The code is for a TCC (Torque Convertor Clutch) solenoid problem.

Chances are pretty good the problem is the wiring where it goes into the transmission or the TCC solenoid itself which is in the valve body

There was a bulliten released from Ford about three years ago about this code being set after trans overhauls. In Ford's program stratagies, the P07xx codes are for computer detected failures due to mechanical responses. The P17xx code series are computer identified electrical failures. This code you are getting gets set when the computer does not see the what it would expect from Torque Converter lock-up. The most common problem for this (and is even stated in the bulliten I mentioned) has to do with a seal on the input shaft of the trans. The seal either gets damaged when the torque converter is installed or it is accidentally left out during the rebuild. There is not much that you personally can do, but at least you can understand how to best procede.

But
you will most likely end up removing that cover to inspect the harness that goes to all the solenoids and then to inspect the valve body and the TCC solenoid itself. If you have a multimeter then you could ohm through the harness and even the solenoid. I have found that most of the time this code was produced because of the solenoid itself. But it could be the circuits to it also. There is a big connector an top of the trans that goes into the trans and the internal harness inspect that connector for any corrosion or damaged pins or wires.

TCC solenoid circuit failure during on-board diagnostic.

TCC solenoid circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM drive failure during on-board diagnostic.

Failed ON - engine runs rough/vehicle shudder, engine stalls in DRIVE (2nd, 3rd or 4th) at low idle speeds. (Short circuit).
Failed OFF - torque converter clutch never engages (Open circuit) (MIL on).

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

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Code P1887, as you probably by now know, is set when there is an issue with the torque converter clutch engagement and disengagement. When this code is set, it inhibits TCC operation, could cause issues with the shift adaptive strategies and possibly issues with 4th gear (Overdrive) operation.

The unfortunate news is that you have the 4T65E transmission in this vehicle and the TCC switch/solenoid is part of the valve body and the valve body is on the side of the transmission (drivers side) and would require at least the lowering of the sub frame to get enough clearance to remove the side cover and to get to the valve body. It is really an involved repair and would not be for the faint of heart nor those with little to no mechanical experience.

I dont know where you are located, but if you are anywhere near Indiana I would visit www.grandprixforums.net and sign up there and post up your issue there. Its an online community for Grand Prix's and other vehicles that use the GM 3800 engine. There is a gentleman on there that goes by the screen name of Trannyman95 and he makes his living rebuilding 4T65E's among others and is highly regarded as a top notch transmission builder.

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