Question about 1997 Nissan Maxima

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Torque converter mulfunction

1997 nissan maxima gettin code PO740 how do i fix the problem

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This is a circuit code. It could be the Transmission control module(TCM), the solenoid, or the wires in between. I would start by checking the wires running between the transmission control module and the transmission. Look for any obvious signs of chaffing or breakage. If the harness is ok, replace the solenoid pack in the transmission. If this still doesn't fix, replace the TCM.

Posted on Dec 01, 2008

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1 Answer

Why is my check engine bringing up code po740 and won't go away and stay away


PO740 = Torque Converter Circuit Malfunction

Check all of the torque converter's electric connections--especially on that solenoid (but not just that part). It could be the transmission speed sensor. Just check from the transmission to the fuse box to make sure that the electric circuits have solid connectivity. Don't let oil short it out.

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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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1 Answer

I am not having any problems but i have a po740 torque converter clutch solenoid circuit open


CODE PO740 YOU HAVE FAULTY TORQUE CONVERTER CLUTCH SOLENOID.MAKE SURE WIRE CONNECTOR TO TORQUE CONVERTER CLUTCH SOLENOID ITS NOT DISCONNECTED OR HAS BROKEN WIRES AND DAMAGE.

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Trouble code PO740 for 1998 honda accord lx 2.3 liter 4-cylinder


the common cause of this code is a shorted torque converter lock up clutch.

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Po740 and po700


P0700 Transmission Control System Malfunction P0740 Torque Converter Clutch Circuit Malfunction. Have a nice day

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Engine lite on


700= Transmission Control System
740= Torque converter clutch circuit

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