Hi,

This morning my Fiat Punto 1.2 Active 2004 failed to start, it cranks/turns over but doesn't ignite. I drove the car last night and it started/ran with no issues. There's no spark and we're getting the following error codes:

P0201
P0203
P0202
P0204 - Relating to all the injectors (would this cause the issue? It's unlikely all would fail at the same time)

P0351
P0352 - Relating to both coil packs A and B

Has anyone got any ideas as we're stuck on where to go from here, ruled out a possible ECU issue as it's reading there's problems?

Also if possible, could someone share a wiring diagram may be a fuse issue?

Thankyou in advance.

Fuse F22
supplies Injectors Coils and Fuel Pump

Also Relay K46

Italian Job said:

Fuse F22
supplies Injectors Coils and Fuel Pump

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And these could be a reason the car is not igniting but turns over?

yes
do you hear the fuel pump prime when you turn the key

yea we hear the fuel pump when we turn the key for a couple of seconds I'm bluetangos dad

If you hear the pump prime then its not the fuse or relay

Italian Job said:

If you hear the pump prime then its not the fuse or relay

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Is there a possibility the immobilizer could be at issue or would it not turn over if that was the case?

Would our best course of action be replacing the coil packs and go from there?

BlueTango said:

Would our best course of action be replacing the coil packs and go from there?

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Probably not. This looks like a single cause.
Crank sensor is a possibility. They can prevent firing if dirty and are often shy about throwing a code that points to them.

I will check crank sensor after work and the fuses and relays will keep you updated

simplesimon123 said:

I will check crank sensor after work and the fuses and relays will keep you updated

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The injector and coil pack fault descriptions for those codes are all circuit problems. Potentially the Earth wire for the ECU is faulty and it is a very simple fix. On the 8V car the ecu has a short wire going to the throttle body. On a 16V there is a wire coming from the wiring harness.

judderbar said:

The injector and coil pack fault descriptions for those codes are all circuit problems. Potentially the Earth wire for the ECU is faulty and it is a very simple fix. On the 8V car the ecu has a short wire going to the throttle body. On a 16V there is a wire coming from the wiring harness.

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We will look at this too thankyou

so I have been through the car and tested
everything and found a 10a fuse was blown I think it was f17 engine management replaced and car starts but there is always a but I have a new code p0500 speed sensor I love old cars thanks everyone for your help very much appreciated

Is the speedo working?
Can you clear it and see if it comes back.
The speed sensor on the cars without ABS is on top of the differential housing.
I seem to recall a modified wiring loom for it at some stage.

Brendan W said:

Is the speedo working?
Can you clear it and see if it comes back.
The speed sensor on the cars without ABS is on top of the differential housing.
I seem to recall a modified wiring loom for it at some stage.

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Yes its working fine, we just cleared it.

Hi I would still disconnect the battery and reset plus put it on trickle charge and see does it start after that it might