Dear Punto owners

Have been for a while experiencing some error codes. Only I have no idea what I need to replace the problem to solve.

Here are some codes that appear during reading
Fiat Punto 1.2 16v 2001

P0105
P0420
P1135

Does anyone know what the reason is? and how should it be resolved?

Like to hear from you

Re: p0105

P0420 = cat /convertor


all these codes related to overfueling id guess,

P0420 is cat below efficiency

P1135 Oxygen sensor heater resistance Bank 1 and see this

Best trick may be to clear the codes, drive until the EML comes on (hopefully there will be only one code) sort that first. One code will often trigger others.

(Have been for a while experiencing some error codes)


Some more info might help,

Does the car run rough etc,
are the spark plugs ready to go on the Antiques road show ?

Thanks for your comments.

The car drives well now. First he drove on 3 cylinders. And I replaced the injectors and now he runs well. Only the engine light stays on.
These are the only codes that have come back. The first time there were many more.
But car runs well. Consumption is still high.

Cameleon said:

Thanks for your comments.

The car drives well now. First he drove on 3 cylinders. And I replaced the injectors and now he runs well. Only the engine light stays on.
These are the only codes that have come back. The first time there were many more.
But car runs well. Consumption is still high.

Click to expand...

it will as its unning neat fuel
do a co check to confirm its running rich
get some live data to see what map is actually doing
remember you are killing or have killed the cat and also you are overfuelling causing bore wash which means engine wearing out quickly plus theres a chance your sump can explode if fuel getting in there

sort it tomorrow