Technical Intermittent EML light flashes under load no symptoms helpp!!

[Aromaticrutabaga62]

Hi all,
I have been reading so many posts on here and everyone is so helpful!
But I'm still stuck with my 2012 fiat panda 1.2
It's drives great, no sign of leaks or anything emiss under the bonnet.
But.... under load and WOT the EML light will flash Amber intermittently sometimes for 2 seconds sometimes for 15 seconds. Not often but under certain conditions.

I would never even know something was happening without the light, she drives smooth, no power change nothing!

On plugging it in, codes show: p0300 po302 p0303

1. Had spark plugs changed.
2. All 3 codes show again following eml light flashing amber again.
3. Then changed sparks, coil pack, leads.
4. Added new Earth
5. ran 2 fuel injector cleaners through it.
6.Checked alternator
7. Checked battery,
8. fuel filter been cleaned.
9. Electrical Connection fluid, and all connections checked.
(All done by someone else who's helped out)

Aftet this Still flashes intermittently, only on high revs and over 50mph underload.
Or high revs when stationary trying to cause the fault by just revving.

What could it be should I change the crankshaft sensor as its a cheap easy option? I am hoping this is the problem but the error codes don't match.

I am scared to drive it on motorway for a long period like over 30 minutes as I worry it will happen and loose power.

But some people say to me it's a small fault as the engine seems fine when it happens, so to keep driving and not worry!

Any advice would be great! I am not mechanically minded only theoretically from reading so much on this now.

 

[Eltezz]

Might be worth checking the fuel pump, or changing it as that could cause a WOT misfire if not delivering enough fuel.

 

[varesecrazy]

Hi all,
I have been reading so many posts on here and everyone is so helpful!
But I'm still stuck with my 2012 fiat panda 1.2
It's drives great, no sign of leaks or anything emiss under the bonnet.
But.... under load and WOT the EML light will flash Amber intermittently sometimes for 2 seconds sometimes for 15 seconds. Not often but under certain conditions.

I would never even know something was happening without the light, she drives smooth, no power change nothing!

On plugging it in, codes show: p0300 po302 p0303

1. Had spark plugs changed.
2. All 3 codes show again following eml light flashing amber again.
3. Then changed sparks, coil pack, leads.
4. Added new Earth
5. ran 2 fuel injector cleaners through it.
6.Checked alternator
7. Checked battery,
8. fuel filter been cleaned.
9. Electrical Connection fluid, and all connections checked.
(All done by someone else who's helped out)

Aftet this Still flashes intermittently, only on high revs and over 50mph underload.
Or high revs when stationary trying to cause the fault by just revving.

What could it be should I change the crankshaft sensor as its a cheap easy option? I am hoping this is the problem but the error codes don't match.

I am scared to drive it on motorway for a long period like over 30 minutes as I worry it will happen and loose power.

But some people say to me it's a small fault as the engine seems fine when it happens, so to keep driving and not worry!

Any advice would be great! I am not mechanically minded only theoretically from reading so much on this now.

Hi,

read one of the many threads detailing similar in the 500 section

Sometimes attributed to the Cambelt

 

[Pugglt Auld Jock]

Hi,

read one of the many threads detailing similar in the 500 section

Sometimes attributed to the Cambelt

I think the fact you report no detectable change in performance - Lack of power, evidence of misfire/rough running, as might be expected if a miss fire was occurring - is possibly a pointer to the cam belt/camshaft timing being at the root of this. If so, it would be a good idea to at least remove the top belt cover and check it's physical condition - how long since the belt was changed?

Some of us have just been engaging in a very interesting conversation around this phenomenon in this thread: https://www.fiatforum.com/threads/check-engine-light-at-speed-after-cam-belt-change.517070/ and you might find reading it helpful

Eltezz above makes a sensible suggestion too, particularly as the problem is only happening with a wide open throttle and at high engine revs where max fuel delivery is being called upon. A pressure gauge can be plugged into the fuel rail but would need to be visible when driving so might be a bit difficult to arrange (and, if you do this take an observer to watch the gauge)

 

[Aromaticrutabaga62]

The cam belt was done 6 years ago (I didn't own it then) but seems this fault is more recent. Could it be then due to a stretched belt rather than due to it being changed ?(I know they don't stretch as such but yeah)
Thanks for the tag in the post. Am I right in thinking then that if it may just need a relearn or it is due to timing issue that it is safe to drive and is more of a ghost misfire, especially as I don't have juddering or power loss.
I would say the car does feel a bit flat on acceleration not sure if this is just being a 1.2 though.
Thanks for the advice

 

[Pugglt Auld Jock]

The cam belt was done 6 years ago (I didn't own it then) but seems this fault is more recent. Could it be then due to a stretched belt rather than due to it being changed ?(I know they don't stretch as such but yeah)
Thanks for the tag in the post. Am I right in thinking then that if it may just need a relearn or it is due to timing issue that it is safe to drive and is more of a ghost misfire, especially as I don't have juddering or power loss.
I would say the car does feel a bit flat on acceleration not sure if this is just being a 1.2 though.
Thanks for the advice

Fiat recommended change interval on the belt is 5 years or 70,000 miles whichever comes first or at shorter intervals if a lot of city/stop, start type journeys are made. The good news is that the belts are not often reported to fail although there can be problems with water pump and tensioner bearings - but bearings make noises so you will usually hear them before they fail totally. I'd be removing the belt covers and examining the belt and associated components. However, as a belt change is due you might be better to get that done before spending money chasing a fault which might disappear when the new belt is fitted. Given the history you've revealed here, I'd be giving this to a Fiat specialist or main dealer if you get a decent quote from one. There are pitfalls when changing these belts which we often get people on here, asking for help with, when someone/garage/workshop with no dedicated Fiat experience has done the job.