Technical Limp home mode or something else?

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Technical Limp home mode or something else?

Member @puntodeltathema has some experience in a 500 with poor timing
The engine management is quite sensitive to the cam/crank correlation not being right. If the dealer has set the timing without the official tools (it happens even at main dealers because marking up the pulleys is a lot quicker) then there's some scope for errors being thrown. My money would be on going back to basics with the official setting tools....
 
P01361 I can’t find but P1361 is an Intermittent crank sensor

We don’t have cam too far advanced or retarded errors codes

@field500 can you confirm which engine. I have been assuming a 1.2 with the mention of belt

Some codes are model depend

Something obviously went wrong during the belt change that’s for sure.

Timing error I am sitting on the fence. It’s the most likely but doesn’t fit with the reported error codes.
 
Took the 500 out for its first drive since got it back from dealer following Coil replacement (combination of a being a second car and crap weather last few weeks) - car starts and runs fine, got it on a quite A road and up to 80+ without any issue and when it was back down to 60-65, the Stop Start Disconnect warning light came on, engine management light was flashing and started to misfire and lose power.
Managed to pull into a farm shop car park and car was running very rough and misfiring. Turned engine off and back on, and car appears fine - revs and runs as expected without any warning lights
This is what happened originally, which prompted the original post and trip to dealer.

So its booked in again but any suggestions - just wondering why the stop start disconnect warning light comes on and then the engine management light/rough running/misfire ? On this model you can switch stop start off and it stay off - which we do.

Will update you once dealer looked - they checked timing belt/timing last time (it had just been replaced) and the diagnostics pointed them to the coil pack, which they replaced. Clearly not that (or a duff replacement) !

Thanks
Flashing engine management light is a classic sign of Phonic Wheel Relean that needs to be executed. This happened when I changed the belt myself in October so under the same circumstances. Soon as you turn the engine off and restart if goes back to normal. Over 3500 RPM it’s generally triggered. It literally takes a few mins do with the OBD software. Very poor really that it wasn’t picked up by the dealer. Get yourself a registered version of Fiat Multiscan off internet with some leads and do it yourself. Saves the hassle.

Adam
 
P01361 I can’t find but P1361 is an Intermittent crank sensor



We don’t have cam too far advanced or retarded errors codes



@field500 can you confirm which engine. I have been assuming a 1.2 with the mention of belt



Some codes are model depend



Something obviously went wrong during the belt change that’s for sure.



Timing error I am sitting on the fence. It’s the most likely but doesn’t fit with the reported error codes.
 
Hi
Car went in to dealer yesterday evening - i had to wait for them to have a loan car - they have had it on the diagnotics today and have got the same Errors on Cylinder 1 and 4 (so the previous "fix" of a new coil pack was not the issue)
They have checked the timing and variator, and no issues
They can recreate the issue, i assume in the workshop - the car is not misfire but is "stuttering" (their description)
Checked plugs, leads and coil pack again - all working fine
They have been in touch with FIAT Technical and are awaiting an update from them, but they have said this is a later engine where the variator is not able to fail.
So i am now waiting for FIAT tech to get back to dealer - i am dreading the call to be honest - the only obvious thing i can think of is the ECU is duff or has been broken (!) - but the car appears to run fine, ticks over, starts and runs okay - until you go over 70/75 and the issue is triggered.
The service manager had a chat with me when i dropped it off last night and he said the only thing he could think it was that they had either not done the Phonic Wheel relearn (which they said had been done) or it had not worked when they did it. I assume as part of the work they have done before contacting FIAT tech, they would have done that
So i will let you all know - fingers crossed its a positive update

Regards
 
Still sounds like a problem with the belt change. Fine before the change and failed first drive after

Surprising how often even dealerships get it wrong

Better if we had the full codes

VVT advances more the higher the revs. If it’s slightly out you normal get a cam correlation error

Fingers crossed it’s soon sorted
 
Still sounds like a problem with the belt change. Fine before the change and failed first drive after

Surprising how often even dealerships get it wrong

Better if we had the full codes

VVT advances more the higher the revs. If it’s slightly out you normal get a cam correlation error

Fingers crossed it’s soon sorted
Hi
I have not got the codes yet - just the misfire on Cylinder 1 and 4. The garage will give me the codes with the paperwork when i go back. Last time it was P0301-98 (cyl 1), P0301-98 (cyl 4), p0300-98 (random misfire) and P0136-23 (lambda probe)
I pointed out to the service manager that car was fine prior to service/belt/tensioner and water pump change............ Will see what they come back with and I will update here
I appreciate the can get things wrong - they have been a FIAT dealer for over 40 years, so i would hope they know what they doing - bit worrying they have had to contact the tech guys though !
 
Hope there’s a happy out come
Hi
Well, no definitive outcome yet - car went in Monday evening and they still have it. They have got FIAT Technical on the case with it now - they have redone the belt /tensioner/swapped out plugs/ leads, fuel injectors and they have been going out in the car with one technician driving and the other monitoring the laptop plugged into the diagnostics - they can get the car to fault - any speed over 70 basically, but varies between 71 and "early 80's". Codes not showing them anything different after all the work. i.e same cylinder 1/4 misfire etc
They are now going to fit a new Variator - apparently the Variator on this year engine (late 2017 1.2 8v) "can not fail" (words of FIAT Technical) but begs the question as to why you can get a replacement !
In any case, service manager is not convinced but is hopeful - they have said if it is still showing faults, they will get FIAT Technical back in - they have tried all their ideas and their own.
So would a faulty variator cause the issue? Will let you know tomorrow.................
Good news is at least i am not being charged for any of this work - i assume they putting it down to the belt change. The dealer has been great so far with this one.
 
Hi
Well, no definitive outcome yet - car went in Monday evening and they still have it. They have got FIAT Technical on the case with it now - they have redone the belt /tensioner/swapped out plugs/ leads, fuel injectors and they have been going out in the car with one technician driving and the other monitoring the laptop plugged into the diagnostics - they can get the car to fault - any speed over 70 basically, but varies between 71 and "early 80's". Codes not showing them anything different after all the work. i.e same cylinder 1/4 misfire etc
They are now going to fit a new Variator - apparently the Variator on this year engine (late 2017 1.2 8v) "can not fail" (words of FIAT Technical) but begs the question as to why you can get a replacement !
In any case, service manager is not convinced but is hopeful - they have said if it is still showing faults, they will get FIAT Technical back in - they have tried all their ideas and their own.
So would a faulty variator cause the issue? Will let you know tomorrow.................
Good news is at least i am not being charged for any of this work - i assume they putting it down to the belt change. The dealer has been great so far with this one.
Sorry to hear it’s not fixed yet

But great your not being charged 👍
 
Hi
Think we have success - after much investigation and work by the dealer, the replacement of the variator seems to have fixed the issue. They have certainly been road testing it - done over 100 miles, which of course is not an issue. Three test runs today and I was asked to collect it - as the trip home is mainly 30/40 made a detour and did 15 miles up and down to the next junction on the motorway - 85-90 no issue, car runs lovely.
So I hope that's it - will see how it goes over the next few weeks, albeit the wife never goes over 60 on her commute.
No charge by the dealer so I assume they think changing the belt/tensioner has impacted on the Variator etc.
Thanks for all your input and suggestions !
Regards
 
Hi
Think we have success - after much investigation and work by the dealer, the replacement of the variator seems to have fixed the issue. They have certainly been road testing it - done over 100 miles, which of course is not an issue. Three test runs today and I was asked to collect it - as the trip home is mainly 30/40 made a detour and did 15 miles up and down to the next junction on the motorway - 85-90 no issue, car runs lovely.
So I hope that's it - will see how it goes over the next few weeks, albeit the wife never goes over 60 on her commute.
No charge by the dealer so I assume they think changing the belt/tensioner has impacted on the Variator etc.
Thanks for all your input and suggestions !
Regards

Hi again, 🙂

Were there any points of note from this?
 
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