Hi all,
I have 2009 1.9 mJet sport edition with very often "check engine" error.
This error appear mainly after regular service,specifically after changing of fuel filter with acceleration up to 2000rpm only.In official service garage people told me that they dont know the cause of error.I even did investigation through local (not official) garages and their diagnosis are bad fuel.
Does anyone knows how to fix this.
Thanx in advace

What's the error code ?

Strange,but true,there is no error code.While connected to comp doesnt show any error at all except the one in cabin.

Sorry to say, if the car is actually running OK, then without an error code, finding the fault is going to be next to impossible.

It is running ok,but up to 2000rpm.
Above that,it is torture to a car.And this is nice 130hp ???
I'll ignore the code for few days as I replaced fuel filter 2 days ago.I hope the error will desapear by driving time.
I have no choice ?

Hi all again,

After some time of change of fuel filter,check engine error dissapear from car cabin and everything was ok untill few days ago."Check engine" is again active.This time the error exist on diagnostic comp.
Error code is P0091 (low fuel pressure).
Took out a filter,cleaned it a bit and still the same.
Driving up to 2000rpm is ok.Above 2000rpm "check engine" is active and car is without power at all.
Any other advice?
I found on forum topic about it,but nothing clear is written.
Please help.I am getting sick and tired of people who says that they know how to fix everything (I mean abt our local garages and even the official fiat service)
Thanx

Did the error show before you changed the filter? Sometimes stored codes can cause issues.

Not going over 2000pm - sounds like car is in limp mode (car limits itself so doesn't do any damage).

Check the egr valve. Try giving it a good clean before get new one. On the Alfa forums with the 1.9 engine they cleaned the egr valve and same error went. Worth a check

Here is the guide on how to clean it
https://www.fiatforum.com/grande-punto-guides/178715-cleaning-egr-valve.html

Have you bled the fuel system? If there's air in the fuel system it will cause issues such as you've reported!

Would of thought if air in the system then car wouldn't start due to lack of pressure to inject the fuel. But it could be air getting in somewhere would imagine but seems strange that only does it at 2000+rpm if its that

cobalt01 said:

Did the error show before you changed the filter? Sometimes stored codes can cause issues.

Not going over 2000pm - sounds like car is in limp mode (car limits itself so doesn't do any damage).

Check the egr valve. Try giving it a good clean before get new one. On the Alfa forums with the 1.9 engine they cleaned the egr valve and same error went. Worth a check

Here is the guide on how to clean it
https://www.fiatforum.com/grande-punto-guides/178715-cleaning-egr-valve.html

Click to expand...

The error appear after routine service was done.Actualy a few days later.
I'm sure that I have original fuel filter,not some low quality sh#t.
I forgot to mention that engine was remaped 2 and a half years ago.But this error never happened before.

I'd start with a egr valve clean see how that goes as Alfa are Fiat's and seemed work on other 1.9s

From their id look at the fuel pressure regulator as the p0091 code on a fiat means its control circuit is low on it (faulty wire or needs replacing).

If still no luck, I'd get someone check the fuel pump in case this is having issues

cobalt01 said:

Would of thought if air in the system then car wouldn't start due to lack of pressure to inject the fuel. But it could be air getting in somewhere would imagine but seems strange that only does it at 2000+rpm if its that

Click to expand...

Yesterday checked entire fuel system,and no air found.Replaced again a new fuel filter.In addition checked turbocharger.
Everything is just perfectly fine.
Past 24hrs car was like an "airplane", till this evening when error appear again and no power as previously described.

You tried anything in my last post?

As well fuel pump was checked as well with wires and all connections.
Again all perfectly fine.

Is it possible that catalyst has connections with this fault?

cobalt01 said:

You tried anything in my last post?

Click to expand...

Yes, did all as suggested.
Still the same

Not sure tbh, worth a look. Get the mechanic to check the pressure sensor if not got to do with cat. If not that may be the engine control module (so read) as apparently the code can mean that is reading a shortage volts for less than a second (so read). I wouldn't go out spending a fortune on new module unless know for sure that as won't be cheap. Otherwise sorry out of ideas.

Have you got a copy of multiecuscan? Maybe an idea to start car an rev it till 2000rpm and look at live data to see if anything shows up or even clear the error then see if reappears

There is one more mechanic available and I'm keeping him as a last last option due to reason that just a saying "good day" cost 200€ ???
So,you may imagine how big amount of money I need to spend for fixing the problem ?
What ever happened,I can say just "thanx" for help received via forum.

I'll try,in next posts to write what was done and amount of money spent to fix all

Hopefully you'll find the problem. May sound daft but have you just filled the tank an started afterwards? Could be bad fuel.

Only reason I ask is my gp (petrol) can be funny on starting with poor fuel (starts first time but takes that bit longer than good fuel plus sounds like its starting better with good fuel).

My last car was a diesel ford focus that wouldn't start at all some days and others it would. Got all electrics tested etc couldn't find a problem. Took it a dealer who said needed new engine as no compression. Turned out be cylinder seals and ege valve stuck open. Luckily had a warranty so just cost me 500 odd for egr valve. Anyway good luck

Hi,
I have had exactly same issue on mine GP is 2006 1.3 mjet 90 with check engine error and same engine behaving. Everything was fine while testing engine in garage, no problems at all with any of sensors etc.
Must say that you need dedicated mechanic who would like to spent a little more time in the garage but more importantly to test your car while driving it to spot the moment when ECU will be resetting itself and exclude all possible elements in circle. For me it turned out to be the last element in a chain, turbine. This error will not be shown as an error at all. After having repaired turbine at special workshop (300 e) check engine error have gone and I have not had any problems whatsoever for more than two yeas.
Hope this is not your case but this may help you.