Creep judder and changing into the wrong gear

[SheffieldStan]

We bought a 2007 automatic Aygo recently that has creep judder and seems to change into the wrong gear at certain times. It's worst when the car isn't warmed up. But it's passed it's MOT recently.

We've been quoted for a new clutch, flywheel, and the computer that deals with the gearbox I forget the acronym, which comes to quite a lot. 

With those symptoms I'm wanting to be fairly sure that the problem is going to be fixed with the work that's been quoted for. 

If anyone else has had this I'd appreciate any info anyone has. 

[Wiz201]

Yeah it'll be the ECU that is the computer that deals with the automated clutch. It'll fix it, but honestly with a car that age, you could go for another Aygo that is newer if finances allow. The mk2 2014 onwards cars will have the better x shift auto boxes.

[SheffieldStan]

Thanks very much.

I'm new to automatics. The annoying thing is it passed the MOT and it drives, it's embarrassing but that's it. It was just a cheap car to teach my girlfriend how to drive. Fixing it at the dealership is actually cheaper than buying something else at the moment, especially as it was pretty cheap to begin with, as you can imagine. I think in order to give any kind of driving lessons in it I'd need to get it fixed. It's crazy that this problem has nothing to do with an MOT, it doesn't even come up on the Toyota checklist if you take it to the dealer to get checked over. Automatics, huh!

[flash22]

You take it to a main stealer, you're into £2400

MMT's are well known for clutch actuators

a MOT is purely safety and emission if it moves under its own power and no other issues it will pass

as it's an early one, it will be a 5 speed - disconnect the Battery for 15-20 min's and let it reset, a relearn may help also

 

CP-0009T-0113-EN (2).pdf

INF12215_GB.pdf

[WazWii]

On the second gen I get creep judder at start-up. Quite bad. 

I never thought of the ECU. Maybe that is the issue? I wonder if the ECU determines at what RPM the engine revs at and how that then interacts with the clutch. Maybe someone can shed some light on this?

I have the clutch cable adjusted now and then and it seems to do the trick for a while until things revert back to normal (well abnormal). 

I find just raising the revs slightly helps; it gets it out of the judder zone to some extent. 

Regarding wrong gear, no not had that (I think that is dangerous) but I have noticed sometimes when selecting reverse the car will not reverse until you prod the throttle (which gives a little rough backwards movement initially /not ideal) or engage back into neutral from reverse and then back into reverse at which point the ECU seems to understand at the second attempt.

Hope all this is useful. 

[SheffieldStan]

Turn it off and turn it back on again, of course! I will try that, thank you.

For me going up a steep hill it wants to go from 3 to 2, but it somehow gets neutral for a second or 1 before finding 2. Feels dangerous to me also. I get the same issue you describe for reverse too.

[flash22]

You can't drive these like an auto, treat it as a manual with no clutch. Uphill under load if It's going to change up/down back out of the throttle, TBH it's not new driver friendly

[WazWii]

4 hours ago, flash22 said:

You take it to a main stealer, you're into £2400

MMT's are well known for clutch actuators

a MOT is purely safety and emission if it moves under its own power and no other issues it will pass

as it's an early one, it will be a 5 speed - disconnect the battery for 15-20 min's and let it reset, a relearn may help also

 

CP-0009T-0113-EN (2).pdf 1.12 MB · 28 downloads

INF12215_GB.pdf 148.83 kB · 172 downloads

Does the first PDF file you listed apply to the first-gen Aygo only? I am trying to get the judder solved in my car. 

[flash22]

That is for the mk1 (KGB10)

later cars are usually a lot better and have most of the kinks ironed out

there is the clutch actuator tsb for the 6 speed but iirc that doesnt cover the aygo

 

CP-0022T-0411-EN.pdf

[WazWii]

On 9/23/2023 at 8:24 AM, flash22 said:

That is for the mk1 (KGB10)

later cars are usually a lot better and have most of the kinks ironed out

there is the clutch actuator tsb for the 6 speed but iirc that doesnt cover the aygo

 

CP-0022T-0411-EN.pdf 452.56 kB · 73 downloads

Thanks.