99 Cherokee P0740

AUFIN

MEMBER
JEEP CHEROKEE

Have a 99 4.0 jeep cherokee sport running around with the 0740 code showing that my son has been ignoring. Recently it has been shutting down while on the road. No other code seems to be showing up, so my question is just how much trouble can the TCC solenoid cause, and could this be a part of the reason the car is shutting down?

3 Replies

CHEVY22

MECHANIC
1,375 POSTS

Yup sure could be, I would get it to the shop as soon as you can to prevent any further internal damage, my kid does the same thing lol

thanks, jim
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Monday, February 26th, 2007 AT 6:36 PM

AUFIN

MEMBER
2 POSTS

In doing a bit of internet research on the subject of the TCC I've read replies that touch on the possibility of shutting the engine down, but don't elaborate. So I'm having a bit of trouble making the connection.
I'm old school shade tree, so troubleshooting problems that involve certain sensors tend to not make a lot of sense till someone explains the interconnection. The TCC shutting down the engine must be some sort of safety factor. Am I on the right track?

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Monday, February 26th, 2007 AT 9:25 PM

CHEVY22

MECHANIC
1,375 POSTS

The ecm gets input from all sensors on the vehicle , when it gets this info it sends output in a milisecond to all sensors and a fauly sensor like the tcc could be locking the converter when its supposed to be unlocked causing the stall, or visa versa if that makes any sense

code p0740 will set if tcc cannot achieve desired rpm drop in engine rpm when tcc solenoid is near maximum duty cycle

hope this helps, check the fluid and see how it looks

jim

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Monday, February 26th, 2007 AT 9:43 PM