Technical GP 1.2 petrol '06 error P0300 and P0301

[DonFrank]

Hi there,

thanks to everyone, Im new to the forum.

I recently bought privately a used GP 1.2 of 2006.

When I tested drive the car the fuel light was on and the car seemed to run smoothly.

After refilling and since then, the flashing engine management light comes on, but I can't see any issues whilst driving. It doesn't flash when the car runs low on fuel...:bang:

I added the injectors cleaner liquid to the fuel but with no luck.

I plugged the OBD2 scanner and got the code P0300 and P0301.

When did the emission test through the app, the catalyst and oxygen sensor did not pass it

In the next day I will get the car checked, but I'd like to be prepared.

Anyone has got any idea?

Thank you so much!!!

 

[damted]

I found this topic:
https://www.fiatforum.com/punto-ii/279929-punto-p0300-fault-code.html

 

[Bernievarian]

P0300 misfire, P0301 misfire @ cylinder 1 ??

ECUs hate bad batteries/grounding

 

[DonFrank]

Thanks for helping me!

So, based on the old thread and what Bernievarian said, could be a bad battery...

Being a fresh owner of the car, actually I don't know how old it is...I will have a look soon.

In the mean time I went to the garage and after scanning the car, I have been told that the coil needs to be replaced.

I don't understand why they were able to identify the problem having only the codes P0300 and p0301. Do their kind of scanner give more information?

However I agreed to replace the coil for now...fingers crossed!

 

[nikrox]

These cars are notorious for NOT liking generic code readers.
Dedicated Fiat software is widely available and gives 100% accuracy.
Are you planning on buying a new coilpack?..

 

[Bernievarian]

MES, MES, MES, and then we can (maybe) help ...

 

[DonFrank]

Sorry my ignorance...what MES stands for?

I want to sort this out and the mechanic told to change the coil pack...I really hope he is right!

 

[Bernievarian]

MES stands for Mutli Ecu Scan, was previously FES, for Fiat Ecu Scan.

Please visit the Gedan web site and you'll get the whole picture. That tool is a MUST if you really want to understand what's going on with your car. The price can seem a bit high (specially the multiplex version) but it's well worth it ! Don't go to cheap (universal) scanners, they're just BS (Bull Sh..), MES will tell you in clear what fault is recorded in the Fiat (also Alfa, Lancia, Chrysler ?) memory + A LOT of other features that a generic scanner would just ignore, or even give you WRONG diagnosis ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

 

[DonFrank]

Thanks Barnie,

I don't think I would buy this tool. I'd rather prefer to go to a competent mechanic that would give me a solution.

For example, yesterday I went to this garage, which after making the diagnose (£30), replaced the spark plugs and leads (£120). He told me they were burnt.
The coil pack is fine. FYI the car has got only 46k miles.

This morning drove to work and the bloody engine management light flashed twice. Plugged a cheap scanner and got same error P0300 and p0301.

Why there is no reliable garage in the whole north-west London :bang: ??

Btw, because the battery seems fine (the car stars with no problem and I don't need to press the throttle to start) could be a problem with the ECU?

I really appreciate your help,

Thank you!

 

[nikrox]

You paid £120 to have plugs and leads changed?...plus £30 for a code read?..AND its still the same?..I do hope you go back and ask for a refund.Id be asking what diagnostic kit they used. You have been advised of the 'best' and most reliable diagnostic kit.If you do go to another garage find a FIAT one
FYI plugs and leads are around £40 tops and take maybe 15 minutes to do.
Do you not have 'diy' skills?...

 

[DonFrank]

I know mate, this is the risk in London. For sure I will go back and ask for refund/explanation.

Back to the problem...because the warning light doesn't flash when running low on fuel....could it be caused by low pressure fuel/leak in the system?

However next one will be FIAT/alfa romeo garages

Thank you!

 

[Pugglt Auld Jock]

Hi DonFrank, Sorry to hear of your problems. I've been posting on this forum for over 2 years and "lurking" around for longer than that. I've read many posts from people who have found miss fire codes when using generic code readers and gone on to waste money trying to "sort" it.

You say nothing about actually experiencing the symptoms of a miss fire? (neither do the others I mention). These engines do have separate HT leads so it's very tempting to believe the code reader's diagnosis of "miss fire" and replace them as a first step.

I can only echo what has been said above and recommend you either have it scanned with Multiecuscan or someone with a genuine Fiat dealer tool. I think I understand that you are not going to do this repair yourself? in which case your plan to consult a specialist Fiat/Alfa workshop is definitely your best course of action.

£30 for a diagnostic scan is not bad - but hopeless if it's inaccurate! The plugs are just a little awkward to get at but simple enough for a skilled mechanic and the HT leads are just "plug and play". £120 does seem a bit steep? Or did they fit iridium/platinum tipped ones (maybe £10 each?)

Please keep us informed as to how it all pans out won't you?
Good luck
Jock

 

[Bernievarian]

Back to the problem...because the warning light doesn't flash when running low on fuel....

It didn't before you filled it, then it started to flash, have you run with almost empty tank since AND CONFIRM it stopped flashing ??

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

 

[DonFrank]

Hello,

Thanks for your help guys!
just a heads-up on my car situation.
I went back to the garage which overcharged me and he said that they need to try other solutions because the misfire can be caused by different faults. He offered me a discount on future jobs. I refused...

I phoned an Alfa/Fiat garage which assured me that they had a specific scanner for Italian cars. I went there...it was everything but a garage...more likely to be car scrapper...however I gave them a go

When plugged the scanner, it started throwing some error codes: P0300, P0301, P0304, airbag, power steering...most of them I never experienced.

Also there was an error "CAN" (no idea what it is), so the technician said that he needed to perform a "proxi alignment".

He disconnected the battery, cleaned the ECU connectors and did the proxi alignment.

After I tested the car but with no luck...the engine management light flashed again.

I went back to the mechanic...he cleaned the ECU memory and said that the next step is to change the coil pack or the ECU itself. I mentioned to him if the misfire could be caused by bad fuel pressure (leakage somewhere), he argued that these are simple engines (??) and the fuel pressure doesn't affect them.

The weird thing is that since then I drove for 30 miles and the engine light didn't flash.

I really don't know what to say...could be that the ECU connectors were dirty? could be that the injectors cleaner is doing is job? no Idea...

I will see what happens in the next days before to say that it is over...mainly because I have to refill with petrol soon!

Thank you!

 

[Bernievarian]

Cleaning the ECU connectors MIGHT have solved your issue, but those are very good quality ones and they're actually almost-any-ingress-proof !

I'd suggest you QUARTER fill the tank, if still ok with the flashing warning, HALF fill the tank, then 3/4 fill it and finally give it a full load ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

 

[DonFrank]

I HALF filled the tank and as expected the engine warning light flashes again.
My impression is that it stops when the tank is filled for less than a quarter.

I suppose there is a relation between the level of fuel and the misfire...Do you have some advice? Faulty fuel pressure regulator? Leakage?

I really don't know what to do...I don't trust any garage...ok I'm quite desperate :bang:

Thank you

 

[Bernievarian]

Can you try with the fuel cap removed ??

 

[DonFrank]

Can you try with the fuel cap removed ??

Thanks Bernievarian, yes I gave it a go, nothing changed

Every time I drive, I try to capture all the noises from the engine...and actually there are some rattling noises/vibrations coming out from the right part of the front when accelerating/releasing the clutch

maybe it is nothing related with the problem, maybe I'm getting mad...

 

[DonFrank]

Hello!

unfortunately I haven't still solved the problem. In the last days I watched a couple of videos which explain how the evap system works. My symptoms seem to be related to the purge solenoid. When I tried to locate it under the bonnet, I realised that the base of the throttle body is greasy and oily as well as the purge valve itself.
What does it mean, what's wrong? Im trying to put the pieces together and I need your help guys...

thank you!!

 

[DGPunto]

While you had the air filter assembly off the top of the engine did you check the large and small tube that run from the filter to the top of the engine? They rot and at current age unless they're been replaced with updated versions they will have rotted through letting oil over the top of the engine and causing running problems