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Old 22-02-2016   #1
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Can anyone please help P0303, P0201, P0202, P0203, P0204

Hi,

I purchased a 2001 (Y Plate) Fiat Punto 1.2 8v from auction on Friday.

When driving home the engine management light came on, solid at first then flashing.

I have had diagnostics on it and the codes were P0303 Cylinder 3 misfire.

This was followed by each of the injectors fault codes P0201, P0202, P0203 & P0204.

These codes were saved and cleared.

Looking under the bonnet it appeared that the plug wires were set to 4,1,3,2 rather than 4,1,2,3 on the coils.

We changed these over and had some success but the juddering maintained (although slightly better).

We checked the timing belt and this was fine.

After changing the discs and pads I fired it up and went for a spin round the block. As soon as I got a couple of hundred yards the flashing engine light appeared again.

I've seen a few posts were people have said that it might be the coil pack or the ECU and wondered if anyone here could shed some light on the situation.

I am awaiting a new diagnostics check and will post the details when have them.

Thanks in advance
D4
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Old 22-02-2016   #2
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

OK,

Diagnostics run again and this time just the P0303 Cylinder Misfire code.

Going to buy no ignition coil pack and see if that solves it.
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Old 22-02-2016   #3
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Try a known good battery first. I had same error changed coils, same was ready to purchase ECU but thought to change battery first and it's been fine since and the error no longer shows, plenty people say change after 2.5 years regardless.
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Last edited by jazz452; 22-02-2016 at 15:44.
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Old 22-02-2016   #4
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Thanks will give that a try.

Was your juddering when idle beforehand also?

Thanks again
D4
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Old 22-02-2016   #5
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Yes but worse with all the electrics on including power steering. If I sat with steering dead straight and no electrics running it was ok. Soon as I turned something on electric windows, power steering heated window and lights the revs dropped then misfired while I was driving or idling. If you could try a different battery without purchasing a new 1 it would be better.
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Old 22-02-2016   #6
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Update.

So changed 1 ignition coil pack and put in a new battery.

Took it for a spin but after a mile the flashing engine light came back.

It then disappeared when slowing down and then came back when revving.

As I have the basic instrument panel I can't say how many rev's it triggered the light at.

Any more ideas people?

Thanks again.
D4
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Old 22-02-2016   #7
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Also let me add, and this may be unrelated or not, but when I switch from sidelights to main lights there is a constant whirring noise as if a motor is turning/working?

Not sure if this is related at all.

Thanks
D4
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Old 22-02-2016   #8
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Quote Originally Posted by d4funky1 View Post
Hi,

I purchased a 2001 (Y Plate) Fiat Punto 1.2 8v from auction on Friday.

When driving home the engine management light came on, solid at first then flashing.

I have had diagnostics on it and the codes were P0303 Cylinder 3 misfire.

This was followed by each of the injectors fault codes P0201, P0202, P0203 & P0204.

These codes were saved and cleared.

Looking under the bonnet it appeared that the plug wires were set to 4,1,3,2 rather than 4,1,2,3 on the coils.

We changed these over and had some success but the juddering maintained (although slightly better).

We checked the timing belt and this was fine.

After changing the discs and pads I fired it up and went for a spin round the block. As soon as I got a couple of hundred yards the flashing engine light appeared again.

I've seen a few posts were people have said that it might be the coil pack or the ECU and wondered if anyone here could shed some light on the situation.

I am awaiting a new diagnostics check and will post the details when have them.

Thanks in advance
D4
could be head gasket, do a compression test
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Old 22-02-2016   #9
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

You might also have a look at the earth wire from the ecu to the throttle body. If it's off it's game it can throw up all sorts of weird stuff.
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Old 22-02-2016   #10
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Thanks, I'll check in the day light tomorrow. Won't be able to do the compression test as no equipment.

What about the constant whirring noise when switching from side to main lights?

Thanks
D4
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Old 22-02-2016   #11
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Quote Originally Posted by d4funky1 View Post
Also let me add, and this may be unrelated or not, but when I switch from sidelights to main lights there is a constant whirring noise as if a motor is turning/working?

Not sure if this is related at all.

Thanks
D4
The headlights have a motor that raises or lowers the beam for loaded unloaded condition on dip beam (switch on left just under the instrument cluster), only works on main beam NOT sidelights or Main Beam. It's only supposed to make the whirring sound when it's working i.e. when u raise or lower the beam
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Old 22-02-2016   #12
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Yeah I'm pretty sure that's what it is but its constant and doesn't stop. It sounds louder on the drivers side when I listen to each light. Can anyone tell me where to disconnect this or is it simply a fuse I can remove?

Thanks.
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Old 22-02-2016   #13
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Is it set 2 zero?
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Old 22-02-2016   #14
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Re: Can anyone please help P0303, P0201, P0202, P0203, P0204

Yep
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Old 22-02-2016   #15
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Can anyone please help P0303, P0201, P0202, P0203, P0204

Here's a quick video of it in action:

Ignore the flashing dash lights as this was the camera doing this for some reason

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