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Author Topic: 3.2 auto gearbox codes  (Read 994 times)

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BigCat

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3.2 auto gearbox codes
« on: 05 July 2010, 12:47:41 »
Hi everyone,

My high mileage 3.2 estate is getting some well needed work at the moment. The auto gearbox has given two codes which I wrote down somewhere and promptly misplaced the paper.

In any case. the two codes relate to:
  • Engine input speed (it can't see it)
  • Torque Converter not locking up.
I should say that both my crank and cam sensors have failed recently. I had the crank sensor replaced in Italy (had to air express from the UK) following which the cam sensor started failing.

As it hasn't yet been replaced, could this be causing the engine speed error code on the auto box? or might it be related to the TCC problem.

On the TCC issue, how does the ECU know that it's not locking up? A quick google indicates that the solenoid is a not uncommon problem for this box. is it simply a case of changing the solenoid?

Thanks for any advice.

Dominic
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TheBoy

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Re: 3.2 auto gearbox codes
« Reply #1 on: 05 July 2010, 16:31:44 »
Ideally, need to wipe the codes, and see what comes back.

BUT, when was ATF last changed, and is it at correct level?
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BigCat

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Re: 3.2 auto gearbox codes
« Reply #2 on: 05 July 2010, 17:40:59 »
I had the ATF and filter changed when I bought it (nearly 40K miles ago) which improved the shifting. Garage said the old stuff was quite dark in colour.

Will have them check the level again. IIRC it has to be measured in gear, at idle, on level ground.

In the excitement I forgot to mention that I've been having an occasional problem with the box not shifting back into low when I coast to a stop. I might be coming down  a long gentle gradient when I get to the stop sign at the end, the gearbox seems to be in a high gear as it's extremely sluggish to drive off. Putting the selector in low or re-starting the engine seems to temporarily solve the problem. That's why I had the gearbox scanned.


« Last Edit: 05 July 2010, 17:41:21 by BigCat »
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BigCat

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Re: 3.2 auto gearbox codes
« Reply #3 on: 07 July 2010, 22:59:16 »
Having replaced the camshaft sensor everything seems to have come good. The engine now starts instantly instead of the endless cranking, idles smoothly, the engine light has gone out and - so far, has not returned.

I haven't scanned the trans, but I'm guessing the lack of warning lights means no error codes...

               ...now just need to sort out the air con leak.
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kcl

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Re: 3.2 auto gearbox codes
« Reply #4 on: 08 July 2010, 08:54:56 »
I had similar issue a few years back; when crank sensor was changed the car was unable to "see" the autobox at all! Then the mech updated the car ecu and gearbox ecu a few times, I think there was a certain sequence in updating (first the engine, then the box or vice versa) which gave the right result.

Funny how the crank sensor can affect transmission...
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feeutfo

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Re: 3.2 auto gearbox codes
« Reply #5 on: 08 July 2010, 09:25:55 »
Bit late in the day but, i would change any suspect sensors esp cam and crank sensor, clear the codes and go from there, if it then plays up and the code returns you know there is something a miss. 4 pots being well known for cam sensors failing and also on occasion upsetting the autobox. Torque converter lock up issue probably also related ime.

Latest auto box software is version 9 i believe? Worth doing while your there if you have tech 2 and tis(?) available.
« Last Edit: 08 July 2010, 09:27:07 by chrisgixer »
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