SES light just came on
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Drifting
Joined: Mar 2012
Posts: 25
Likes: 0
From: North FL
SES light just came on
My SES light just came on - everything still runs good, no noticeable difference in how the Disco drives.
Got the codes ran....they are as follows:
- 741
- 1590 (the three amigos are lit up - related?)
I would appreciate any input from you folks.
Thanks!
Got the codes ran....they are as follows:
- 741
- 1590 (the three amigos are lit up - related?)
I would appreciate any input from you folks.
Thanks!
Thread Starter
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Drifting
Joined: Mar 2012
Posts: 25
Likes: 0
From: North FL
A quick update - I did some research on the P0741 code and it seems to be related to the transmission?
I had the transmission serviced (fluid/filter replaced) about 1,000 miles ago & the transmission is running perfectly....no hard shifting, revving, slipping, stalling when downshifting, etc.
Any suggestions as to what this might be?
Thanks.
I had the transmission serviced (fluid/filter replaced) about 1,000 miles ago & the transmission is running perfectly....no hard shifting, revving, slipping, stalling when downshifting, etc.
Any suggestions as to what this might be?
Thanks.
Administrator
Joined: Apr 2006
Posts: 25,707
Likes: 107
From: Denver, Colorado
741 is the torque convertor circuit is stuck closed, nothing you can deal with. It may go away, but chances are you will need to go to a tranny shop and see what they say. Don't do anything with out getting back to us first with the estimate.
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
P0741 * Torque converter lock-up clutch fault
I'd be inclined to take it back to the tranny service shop and have them resolve it on their nickle. Type of fluid used, quantity replaced, filter O ring, these things could make quite a difference.
From shop manual:
Torque converter lock-up
The EAT ECU energises the lock-up solenoid valve to engage the lock-up clutch. Lock-up clutch operation is dependent on throttle position, engine speed, operating mode and the range selected on the transfer box.
The EAT ECU energises the lock-up solenoid valve to engage the lock-up clutch. Lock-up clutch operation is dependent on throttle position, engine speed, operating mode and the range selected on the transfer box.
and - it is not possible to check torque converter lockup while the vehicle is stationary,
Attached are pages from the RAVE shop manual. Average DIY for tranny filter replace, replace O-rings, don't re-use old ones, don't tear or twist them. If you are more determined, or if the tranny shop needs it, there are also pages attached to get to the lockup solenoid. May just be they need to unplug and replug the electrical cable connection to tranny. Also note that you must fill tranny until fluid runs out.
1590 is part of the 3 Amigos. Separate problem.
Banned
Joined: Jul 2012
Posts: 1,533
Likes: 4
Mike, buzz I had a truck brought to me recently with p0174 and several other codes urned out to be a junk after market mass air flow sensor. Have you two experienced this before? I put in a Bosch and all codes cleared up!
TReK
Joined: Mar 2012
Posts: 3,171
Likes: 45
What is the service history of the transmission??
Fluid ever been changed??
Changing fluid may not help a torque convertor lockup condition - but then it may.
If the frictional components of the fluid in your transmission are way off, then the torque convertor lockup clutch was not designed for that.
If you put in clean fluid and Lukas Stop slip as Mike recommends, then
you may get lucky with the torque lock problem.
You may also want to trace the wiring and make sure any electrical
connections to the transmission are free of dirt or salt.
The act of engaging the torque clutch is probably a few amps at 12 volts.
make sure the FUSE for this current is in good condition and is seated in the fuse block well.
Fluid ever been changed??
Changing fluid may not help a torque convertor lockup condition - but then it may.
If the frictional components of the fluid in your transmission are way off, then the torque convertor lockup clutch was not designed for that.
If you put in clean fluid and Lukas Stop slip as Mike recommends, then
you may get lucky with the torque lock problem.
You may also want to trace the wiring and make sure any electrical
connections to the transmission are free of dirt or salt.
The act of engaging the torque clutch is probably a few amps at 12 volts.
make sure the FUSE for this current is in good condition and is seated in the fuse block well.
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
Here's a pix of the electrical, just above lip of tranny pan, right where they could pinch it, poke it, break it, skin it, etc. The convertor lock up solenoid is the gray with orange (Slate Orange) wire on pin "M".
Also notice that tranny pan might be cleaner than your shop left it.
Also notice that tranny pan might be cleaner than your shop left it.
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