Question about 2001 Pontiac Aztek

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Torque converter switch code - 2001 Pontiac Aztek

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P0719 is torque convertor clutch brake switch curcuit low. p0724 is same curcuit is high, p0741 is tc clutch system stuck off, p0742 is the same but stuck on. p1860 is torque convertor clutch pulse width modulator solinoid curcuit, p1887 is tc convertor clutch release switch malfunction.

Posted on Oct 08, 2010

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Posted on Jan 02, 2017

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SOURCE: I get a scan code

If it is like my Acura the problem was a screen that filters the fluid at the SOLENOID. They are on the outside of the transmission on my FWD and when cleaned we probably didn't need to replace the transmission. (I did anyway since I had gotten the trans.almost all of the way out of the car when I took off the solenoid to get a little more clearance). Follow all of the wiring looms to the solenoids. The torque converter lock-up solenoid pair was on the top nearest to the "bell housing" on my car.

Posted on Oct 24, 2010

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I need help asap 2003 Expedition code p0171 and code p0712 i have and idea of the 1st code but whats the secound code i really need help i dont want to take it to a shop where there going to charge me alot...


P0700 Transmission Control System

P0701 Transmission Control System Range/Performance

P0702 Transmission Control System -Electrical

P0703 Torque Converter/Brake Switch B Circuit

P0704 Clutch Pedal Position Switch -Circuit Malfunction

P0705 Transmission Range Sensor/Switch Circuit Malfunction (PRNDL Input)

P0706 Transmission Range Sensor/Switch Circuit Range/Performance

P0707 Transmission Range Sensor/Switch Circuit Low Input

P0708 Transmission Range Sensor/Switch Circuit High Input

P0709 Transmission Range Sensor/Switch Circuit intermittent

P0710 Transmission Fluid Temperature Sensor Circuit

P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance

P0712 Transmission Fluid Temperature Sensor Circuit Low Input

P0713 Transmission Fluid Temperature Sensor Circuit High Input

P0714 Transmission Fluid Temperature Sensor Circuit Intermittent

P0715 Input/Turbine Speed Sensor Circuit

P0716 input/Turbine Speed Sensor Circuit Range/Performance

P0717 Input/Turbine Speed Sensor Circuit No Signal

P0718 Input/Turbine Speed Sensor Circuit Intermittent

P0719 Torque Converter/Brake Switch B Circuit Low

P0720 Output Shaft Speed Sensor Circuit

P0721 Output Shaft Speed Sensor Circuit Range/Performance

P0722 Output Shaft Speed Sensor Circuit No Signal

P0723 Output Shaft Speed Sensor Circuit Intermittent

P0724 Torque Converter/Brake Switch B Circuit High

P0725 Engine RPM Input Circuit

P0726 Engine RPM Input Circuit Range/Performance

P0727 Engine RPM Input Circuit No Signal

P0728 Engine RPM Input Circuit Intermittent

P0729 Gear 6 Incorrect Ratio

P0730 Incorrect Gear Ratio

P0731 Gear 1 Incorrect Ratio

P0732 Gear 2 Incorrect Ratio

P0733 Gear 3 Incorrect Ratio

P0734 Gear 4 Incorrect Ratio

P0735 Gear 5 Incorrect Ratio

P0736 Reverse Incorrect Ratio

P0737 TCM Engine Speed Output Circuit

P0738 TCM Engine Speed Output Circuit Low

P0739 TCM Engine Speed Output Circuit High

P0740 Torque Converter Clutch Solenoid Circuit

P0741 Torque Converter Clutch Solenoid Circuit Performance or Stuck Off

P0742 Torque Converter Clutch Solenoid Circuit Stuck On
P0743 Torque Converter Clutch Solenoid Circuit Electrical
Now i dont know a lot about automatics especially modern ones with all this fancy electronics thats used nowdays but i think its a fault with the temperature sensor for the gearbox.But where its located and what it looks like i have no idea it could even be mounted inside the gearbox .Sorry not a very good answer from a mechanic but?? very few of our europeon cars come with auto transmission .Evan when i do know whats wrong i cannot buy the parts for the gearbox as only re-con boxes supplied by the dealer so best advice is to try a specialist in auto box repairs only .PS some of my best students when i used to teach mechanics many moons ago were the girls so no excuses like iam only a girl please

Apr 22, 2013 | Cars & Trucks

1 Answer

Codes po740, po743 ? po753 all at once. Where should i begin for repairs?


You must do the diagnostics for each code.
Here are the possibilitesP0740 DODGE - Torque Converter Clutch Circuitxicon.jpghttp://engine-codes.com/p0740_dodge.htmlForum CodePossible 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
P0743 DODGE - Torque Converter Clutch Solenoid Circuitxicon.jpghttp://engine-codes.com/p0743_dodge.htmlForum CodePossible causes- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid

P0753 DODGEP0753 DODGE - 3-4 Shift Solenoid Relayxicon.jpghttp://engine-codes.com/p0753_dodge.htmlForum CodePossible causes- Faulty shift solenoid valve
- Shift solenoid valve harness or connectors
- Shift solenoid valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid

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P0741 code


P0741 MITSUBISHI - Torque Converter Clutch System Malfunctionxicon.jpghttp://engine-codes.com/p0741_mitsubishi.htmlForum CodePossible 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
- Transmission internal mechanical problem

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1 Answer

I have a 04 buick rendezvous with dtc code PO742


Hello, This defect means your torque converter is switched on and not disengaging.
This can be a toggle type switch or the torque converter Lock-up is stuck.

I service mostly Ford family Brands and not GM, everyone has their own way to do stuff. I can tell you that the Torque converter is deeply embedded between the engine and trans and it would make sense to have the controls for it accessible from outside. Your PCM (Powertrain Control Module) may be at fault, save for any toggle relays inbetween the PCM and the Torque Converter. Sometimes shift points and other information can be "Flashed" or reprogrammed with a Dealer computer. This is a different device than just a scanner that reads your Trouble Codes.

At least you can ask about repairing this problem and pricing info and pick your best spot. I looked under the NHTSA Website for you and there was no mention of repeated problems like yours for your specific vehicle.

You can ask at a good Autoparts store if there is a "Torque Converter Lock-Up" switch for your trans and proceed from there. A GM Expert at this site may be able to help you more than I can, but you can try my info and see what happens.

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O/D flashing 2000 Ford ranger xlt 4.0 4x4


ask if it has a tcc, or or maybe it's a tss
which is a torque convertor lockup switch
or torque c, sensor switch

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2001 tj code p0740


That is the torque converter clutch circuit. Have the torque converter switch and/or relay switch checked, or torque converter lock up switch.

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Emissions test code comes up as 0743 torque converter circuit problem. how do you fix this on a 1998 ford windstar 3.8l engine?


U have a problem in the transmission torque converter clutch control circuit, most likely the solenoid switch that applies the lock up clutch of the torque converter is defective or a the torque converter itself is defective, the trans pan will need to be removed to check the problem further.

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