Question about 2001 Cadillac DeVille

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Check engine light is on it said torque converter is stuck or off but the car isn't showing any problems in shifting I was wondering if it could be a sensor problem.

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If it was a P0741 code, the converter is not locking as designed. This does not affect the shifting and may be unnoticable to the driver. However, if the converter is not locking, your fuel mileage will be reduced. The converter clutch is designed to lock the engine to the transmission at highway speeds, thus reducing the normal losses associated with the fluid shear in the converter.
The code can be caused by a failure of the wire that signals the PCM when the solenoid is on or by failure of the solenoid itself. In your car, the wiring for the clutch is in the same cable as the shift solenoid, including use of the same fuse. For this reason, I suspect your solenoid has failed. You can test the solenoid by hotwiring its terminals to the battery and listening for a click. Remove the connector from the transmission and apply positive 12 volts to pin "U" and ground to pin "T". If it doesn't click, replace the solenoid.

check engine light is on it said torque converter - 5e3b6b8.gif

Posted on Oct 06, 2010

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SOURCE: 1998 olds intrigue service engine light is on scanned as torque c

The whinning noise from my experance is caused from the filter starting to get pluged in trans. restriction the flow of trans. fluid, its more noticeable when its colder out and oil is thicker. might be a good time to service trans if you havent done it yet. I'am like you i don't know of any torque converter sensor, but if it showed up it must have one, or its something else that kicked that code out, or he read it wrong. I wouldent wory about it, its lasted this long chanses are it will last the life of the car. Did autozone erase the code? If they did When it comes on again have it scaned again and see if it shows the same code, its posible, that code could have been stored in the computer from another time the chk.engine light came on and you did not see it. It only has to come on for a split secound to store a code.

Posted on Feb 13, 2009

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


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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.

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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

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The whinning noise from my experance is caused from the filter starting to get pluged in trans. restriction the flow of trans. fluid, its more noticeable when its colder out and oil is thicker. might be a good time to service trans if you havent done it yet. I'am like you i don't know of any torque converter sensor, but if it showed up it must have one, or its something else that kicked that code out, or he read it wrong. I wouldent wory about it, its lasted this long chanses are it will last the life of the car. Did autozone erase the code? If they did When it comes on again have it scaned again and see if it shows the same code, its posible, that code could have been stored in the computer from another time the chk.engine light came on and you did not see it. It only has to come on for a split secound to store a code.

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