resetting ECU - Page 2

m1tch1987 · Aug 30th, 2012, 15:11

Is yours an auto?

johandh · Aug 31st, 2012, 06:08

Would this disconnecting the battery work on erasing the long term fuel trims?

960kg · Aug 31st, 2012, 09:55

Disconnect the battery by all means and reset the ECU but it will only drive ok if your lucky for about 10 miles then the problems will be back.

Just best to attack the problem for good.

Everytime the ECU is reset it has to get used to the way you drive again, so therefore you won`t get the best from the engine as it doesn`t know how you drive!

Milloni99 · Apr 9th, 2013, 22:28

Hi Bongo - appreciate this was a posting from a longtime ago bu this is exactly the issue I have - erratic idle and stalling following a dead battery having been away on hols for a week. Do I need to do anything other than get some mile on the clock for it to re-learn its values?

GrahamBrown1 · Apr 9th, 2013, 22:43

960KG is right it doesn't reset anything for good.

srs airbag light can only be reset by a dealer, for safety reasons, clan a member on here knows alot about these sorts of things,

shadowsa · Oct 28th, 2014, 08:00

I disconnected the battery on the car on Saturday, and left it off for around 20 minutes. Afterwards i left the terminals together for about 5.

Reconnected everything and took the car for a drive. First 10 minutes was weird. Shifting was very hard in the autobox, but once it learned how the driving style is, everything was fine again.

Must admit, i think shifting is now allot smoother, 3 days later.

Car feels better. I think the ECU does get itself into a bit of a twist every now and then.

AMMendes · Dec 9th, 2014, 20:55

Tomorrow will try this. As for all I've been testing the engine light doesn't turn off.
I know the problem is from vacuo leek and a bad LPG system

Rossthecrow · Oct 12th, 2016, 21:07

Hi just had a turbo pipe replaced that was split on v50 2.0d and car seems to drive kinda normal for a bit then goes into limp mode it does rev above 3000rpm buy nothing there any body shed a bit of light on it

ITSv40 · Oct 12th, 2016, 22:10

Quote:

Originally Posted by Rossthecrow

Hi just had a turbo pipe replaced that was split on v50 2.0d and car seems to drive kinda normal for a bit then goes into limp mode it does rev above 3000rpm buy nothing there any body shed a bit of light on it

You are in the wrong forum mate. Post in the S40/V50 forum and you should get an intelligent reply.

Slevin · Jul 2nd, 2017, 15:13

So does this way of resetting the ecu work? I am thinking about doing it as i am fitting a bit bigger turbo and 440cc injectors instead of the old 312.

Aug 30th, 2012, 15:11	#11
m1tch1987 Premier Member Last Online: Dec 29th, 2013 12:08 Join Date: Apr 2011 Location: Berkhamsted	Is yours an auto? __________________ 2003 Volvo V40 1.9D Sport - MPG below

Aug 31st, 2012, 09:55	#13
960kg Premier Member Last Online: Dec 28th, 2022 12:25 Join Date: Jun 2009 Location: Mercville	Disconnect the battery by all means and reset the ECU but it will only drive ok if your lucky for about 10 miles then the problems will be back. Just best to attack the problem for good. Everytime the ECU is reset it has to get used to the way you drive again, so therefore you won`t get the best from the engine as it doesn`t know how you drive! __________________ Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto Remap 290bhp 628Nm torque @ 1600revs 45.1mpg

Apr 9th, 2013, 22:43	#15
GrahamBrown1 VOC Member Last Online: Today 22:25 Join Date: Feb 2013 Location: North Yorkshire	960KG is right it doesn't reset anything for good. srs airbag light can only be reset by a dealer, for safety reasons, clan a member on here knows alot about these sorts of things, __________________ Previous -03 S40, 04 V70 D5, 04 V70 D5 Sport, 05 V50, 07 S60 D5, 09 V70 D5 R design, 12 XC60 DrivE, 15 V60 D3 Current- 05 XC90 D5 Exec, 12 XC70 D4 AWD Se Lux, 14 S80 D3 Se Lux

Aug 31st, 2012, 06:08	#12
johandh Junior Member Last Online: Sep 10th, 2015 12:35 Join Date: Aug 2012 Location: Coventry	Would this disconnecting the battery work on erasing the long term fuel trims?

Apr 9th, 2013, 22:28	#14
Milloni99 New Member Last Online: Jul 2nd, 2013 23:29 Join Date: Nov 2010 Location: Tunbridge Wells	Hi Bongo - appreciate this was a posting from a longtime ago bu this is exactly the issue I have - erratic idle and stalling following a dead battery having been away on hols for a week. Do I need to do anything other than get some mile on the clock for it to re-learn its values?

Oct 28th, 2014, 08:00	#16
shadowsa New Member Last Online: Apr 12th, 2016 08:09 Join Date: May 2014 Location: Port Elizabeth	I disconnected the battery on the car on Saturday, and left it off for around 20 minutes. Afterwards i left the terminals together for about 5. Reconnected everything and took the car for a drive. First 10 minutes was weird. Shifting was very hard in the autobox, but once it learned how the driving style is, everything was fine again. Must admit, i think shifting is now allot smoother, 3 days later. Car feels better. I think the ECU does get itself into a bit of a twist every now and then.

Dec 9th, 2014, 20:55	#17
AMMendes Junior Member Last Online: Apr 6th, 2015 11:41 Join Date: Oct 2014 Location: Lisbon	Tomorrow will try this. As for all I've been testing the engine light doesn't turn off. I know the problem is from vacuo leek and a bad LPG system

Oct 12th, 2016, 21:07	#18
Rossthecrow New Member Last Online: Nov 17th, 2019 15:18 Join Date: Jul 2016 Location: Nottingham	Hi just had a turbo pipe replaced that was split on v50 2.0d and car seems to drive kinda normal for a bit then goes into limp mode it does rev above 3000rpm buy nothing there any body shed a bit of light on it

Jul 2nd, 2017, 15:13	#20
Slevin Master Member Last Online: Today 19:14 Join Date: Jun 2011 Location: London	So does this way of resetting the ecu work? I am thinking about doing it as i am fitting a bit bigger turbo and 440cc injectors instead of the old 312.

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