Technical Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

Currently reading:
Technical Euro6 1.2 Throttle Response, Hill Start Issues & Watchdog report

I do have a very real fear that my little car won't be deemed suitable for the fix....and what I do if this is the case?

I also doubt this will be the case.

Totally understand where you're coming from in your earlier post too. I really don't think dealers realise just how much these "sales targets" mean to us.

Easy for me to say I know, but keep your chin up (y)
 
The only contact I have had in recent weeks is from Fiat Finance because I am rejecting the car.No contact from CS or dealer regarding the latest Fix.I am still going down the rejection route as the problem has gone on for almost 12 months.If this fails and the car is fixed I still want some compensation either in the form of cash or a new car.What I have read on Audi forums I am sure if this problem had been on our Audi, it would have been exchanged for another car without much trouble.
 
The only contact I have had in recent weeks is from Fiat Finance because I am rejecting the car.No contact from CS or dealer regarding the latest Fix.I am still going down the rejection route as the problem has gone on for almost 12 months.If this fails and the car is fixed I still want some compensation either in the form of cash or a new car.What I have read on Audi forums I am sure if this problem had been on our Audi, it would have been exchanged for another car without much trouble.
not if 100,000 cars were broken = )
 
The only contact I have had in recent weeks is from Fiat Finance because I am rejecting the car.No contact from CS or dealer regarding the latest Fix.I am still going down the rejection route as the problem has gone on for almost 12 months.If this fails and the car is fixed I still want some compensation either in the form of cash or a new car.What I have read on Audi forums I am sure if this problem had been on our Audi, it would have been exchanged for another car without much trouble.

Mmmm, certainly not my experience with Audi.

But good luck with getting some kind of offer from Fiat (y)
 
not if 100,000 cars were broken = )

I have a soft spot for VW (well Golf GTi’s anyway) and various Audi’s but the service I have received from VAG has been appalling. Try Googling Audi Multitronic.

Fortunately I’ve not had any interaction with Fiat service yet. I’m not hopeful based on this thread! With any luck I’ll not need to.

As previously stated both our 500’s have ASR but are we really sure these are immune?
Ours are fine but these would be the versions I would suspect as being problematic as they probably include software to cut engine power if it senses any wheel slippage. I say probably because it doesn’t necessarily follow that ASR will cut engine power, it may just apply the brake to the single wheel that’s it senses slipping or the wheel(s) it thinks it should brake in the event of a skid, under/over steer. Some systems just do that rather than cutting engine power as well. I seem to remember 1 post saying that Fiat wanted the ABS data which would suggest they think there’s a link to ASR.

Anyway I’ll post the ECU numbers tomorrow.
 
I'm a VW man too and the car uses the ABS sensors on the wheel to detect individual wheel speed. I noticed on one of the latest ECU pics it was Bosch. (Same as VW?) I assume that's why they want ABS data. If I switch off traction control on my Golf it doesn't bog down as much at junctions. In the DSG (auto) versions, traction control is switched off to allow 'launch control'.
 
I noticed on one of the latest ECU pics it was Bosch.

The connectors are Bosch - the photos don't show a makers name on the ECU, so for now that's an assumption.

The Euro5 used AMP connectors and a Magneti Marelli ECU which is physically very different; I'd now bet serious money that this issue is down to the change in ECU type on the Euro 6 engines.

At least we now have a very easy check to identify the Euro6 cars which anyone can do - just lift the bonnet and look at the ECU. Unfortunately it looks like it's going to be a wee bit harder to get part numbers off the new ECU's as you're probably going to have to unbolt something.

If Fiat had been more open in sharing technical information with the community, we'd likely have got to the bottom of this by now. Letting it get to the point where folks are tearing their hair out and threatening to reject cars is, to my mind, more of an indictment against Fiat than having allowed this to slip though Quality Assurance in the first place.
 
Last edited:
OK I can’t see any serial numbers without removing the ECU.

The only identification I can see being they are Magneti Marelli and have a 4 digit number stamped on the steel casing, my wife has 1504 on it and mine is 1864
 
I'm trying to build a table of ECU part numbers to see when Fiat changed the hardware (it's reasonable to assume different part numbers = different hardware). This could be useful in future for all kind of queries, not necessarily relating to this specific issue - and could help purchasers of secondhand cars to find out what exactly they're buying.

Fiat 500 1.2 Lounge, UK registered 04/12/2009
Magneti Marelli ECU, AMP connectors
Ecu Part 51847332
Tag on ECU Connectors 05.11.2009, Motore 8V EVO-2 F5

I notice you have AMG connectors, your car must be so much faster than mine!!!
 
Thanks gazz_bee (y)

Am I right in assuming yours does not have S/S or the revised suspension? I'm thinking the ECU was changed from 51847332 to 51875964 as part of the 2010 model year revisions.

have just had a look of mine, mine Isa Marelli one and gives no indication of being Euro 4 or 5.

Maxi, is yours also part no 51847332?

I notice you have AMG connectors, your car must be so much faster than mine!!!

:ROFLMAO:

Well done for spotting that typo! (since edited ;))
 
Last edited:
Thanks gazz_bee (y)

Am I right in assuming yours does not have S/S or the revised suspension? I'm thinking the ECU was changed from 51847332 to 51875964 as part of the 2010 model year revisions.



Maxi, is yours also part no 51847332?



:ROFLMAO:

Well done for spotting that typo! (since edited ;))

Couldn't resist with the typo. Yes, non start stop model and missed the suspension update by a month or so.
 
Couldn't resist with the typo. Yes, non start stop model and missed the suspension update by a month or so.

Been following this issue with great interest.
I am now confused- I thought this issue has now been confirmed as being down to euro6 AND the car not having hill hold?
If so why are 2010 ecu's being mentioned?
Apologies if I have misunderstood.
 
Been following this issue with great interest.
I am now confused- I thought this issue has now been confirmed as being down to euro6 AND the car not having hill hold?
If so why are 2010 ecu's being mentioned?
Apologies if I have misunderstood.

No, you've not misunderstood.

We have drifted slightly on the issue of older ECUs, partly to build up as complete a picture as we can of the different ECUs which have been fitted to the 500 over its production run, and partly because this may give us an additional and simple way of identifying other changes made to these cars that are in no way connected to the current issue.

Also we have now confirmed that the Euro 6 vehicles have a totally different ECU to the earlier cars, something we didn't know earlier in the thread.

I am still hoping to be able to tie this issue to a specific ECU part number; this appears to have been complicated by Fiat moving the part number to a place on the ECU which can't be seen without dismantling.
 
Last edited:
No, you've not misunderstood.

We have drifted slightly on the issue of older ECUs, partly to build up as complete a picture as we can of the different ECUs which have been fitted to the 500 over its production run, and partly because this may give us an additional and simple way of identifying other changes made to these cars that are in no way connected to the current issue.

Also we have now confirmed that the Euro 6 vehicles have a totally different ECU to the earlier cars, something we didn't know earlier in the thread.

Sorry, yes, was just about to edit my last post.
Maxi did say, though a couple of pages ago, that he thought euro5 cars were affected also??
 
Nah, there are Euro 5 cars affected

... 2 days ago.
Looking at the possibility of a 1.2 panda, fancying the trekking though as that only comes in twinair or diesel, if indeed euro5 is affected by this.
 
Last edited:
Maxi did say, though a couple of pages ago, that he thought euro5 cars were affected also??

I haven't seen any concrete evidence of that yet. It's been said that the changes made to the ECU which are causing this issue aren't directly related to emissions control, but AIUI the thinking is only those 1.2 cars homologated as Euro 6 are affected (and not all Euro 6 1.2's at that).

When this thread started, the whole Eu5/Eu6 issue was much less clear than it is becoming now.

... 2 days ago.
Looking at the possibility of a 1.2 panda, fancying the trekking though as that only comes in twinair or diesel, if indeed euro5 is affected by this.

Neither the TA nor the Mjet are affected by this issue.
 
Last edited:
I haven't seen any concrete evidence of that yet. It's been said that the changes made to the ECU which are causing this issue aren't directly related to emissions control, but AIUI the thinking is only those 1.2 cars homologated as Euro 6 are affected (and not all Euro 6 1.2's at that).

When this thread started, the whole Eu5/Eu6 issue was much less clear than it is becoming now.

Surely if euro5 cars were affected, which must include many thousands, not being able to go up a steep hill would have been mentioned before now.
Common sense would tell us that the new ecu on the euro6 is most likely the culprit.
 
Surely if euro5 cars were affected, which must include many thousands, not being able to go up a steep hill would have been mentioned before now.
Common sense would tell us that the new ecu on the euro6 is most likely the culprit.

Absolutely, but we didn't know for sure that the Euro6 cars had a different ECU until a short while ago.
 
Neither the TA nor the Mjet are affected by this issue.[/QUOTE]


Sorry, yes I know, which is why if euro5 are indeed affected, that would make me avoid one until the issue is resolved in the new year.
 
Back
Top