Transmission will not shift into gear

SPARKYII78

MEMBER
2006 CADILLAC SRX
V6
2WD
AUTOMATIC
180,000 MILES

I believe the transmission is going into gear but it won't move. I'm taking it in the head a computer hooked up to it and it kicked out different codes one being for the ECU. Before it wouldn't engage it all it didn't always want to go into second gear. That lasted a couple days. Now it won't go into gear at all. I don't know what to do. Please help

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Wednesday, September 8th, 2021 AT 10:08 AM

13 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Can you list the codes for me to see?

https://www.2carpros.com/articles/automatic-transmission-problems

I would start by changing the fluid and filter. If you have a clogged filter, it will not engage.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy

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Wednesday, September 8th, 2021 AT 11:12 AM

SPARKYII78

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7 POSTS

I do not have the codes any longer. I had it done at AutoZone parts store.

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Wednesday, September 8th, 2021 AT 11:31 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, I would start by changing the fluid and filter and see if it goes into gear.

Roy

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Wednesday, September 8th, 2021 AT 11:33 AM

SPARKYII78

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7 POSTS

How possible is it that the problem is the UCU?

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Wednesday, September 8th, 2021 AT 11:56 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

That is why I needed the codes. They should never have cleared them. Clearing does nothing. Without that information, we are taking shots in the dark.

Roy

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Wednesday, September 8th, 2021 AT 12:24 PM

SPARKYII78

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7 POSTS

I don't think they cleared the codes. I just misplaced the copy they give me but I do remember there was a ECU code.

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Wednesday, September 8th, 2021 AT 12:25 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Is the light still on?

If it is then go back and have them check again for the codes.

Roy

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Wednesday, September 8th, 2021 AT 12:38 PM

SPARKYII78

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Yes, the light is still on. But I can't go back and check because it won't go into gear can't drive it.

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Wednesday, September 8th, 2021 AT 12:39 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

See if someone you know has a simple code reader you can borrow.

That will at least get the codes so I can check on them.

Roy

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Wednesday, September 8th, 2021 AT 2:23 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Here is a guide so you can get your codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let us know.

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Wednesday, September 8th, 2021 AT 6:08 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

I attached the procedure for changing the fluid for you below. It is a little involved but follow the instructions and you can do it yourself.

I also attached the amount of fluid required when you change it and the flow chart for no moving in any gear.

Roy

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Thursday, September 9th, 2021 AT 12:13 AM

SPARKYII78

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Changing the fluid and filter fixed my problem. I can't thank you enough. First chance I get I'm going to take it back and get the computer hooked back up get the codes to send to you. Again thank you so much.

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Sunday, September 12th, 2021 AT 2:30 AM

ASEMASTER6371