For a while now I’ve been having the engine management coming on and reading as error code P0352 which is ignition coil b. It’s been taken to a garage where the mechanic replaced that coil as well as putting new spark plugs too. However this hasn’t solved the issue and the light is still coming on. Car is misfiring and spluttering which brings on the light but sometimes it randomly comes on. Car isn’t misfiring or spluttering all the time though. I’m now stumped on what is wrong. Does anyone have any ideas? It’s a 2009 plate 1.1 panda

Presuming you have fitted new spark plugs and the new coil has its own plug leads, It sounds like a cable fault or cable connector fault. Check the wires very carefully for chafing or fractures and examine the connectors for corrosion, loose wires, etc.

Loose wire in the loom to the ECU is common to 1.1's.

It seems something in the connector that's common to the coils and injectors is at fault, so either coil or injector DTC's get flagged and the car misfires or cuts out, usually over humps and bumps in the road.

Plenty have suffered and some have fixed it.
A read through these will help.

https://www.fiatforum.com/panda/420817-injector-problem-code-p0202-cyl-2-injector.html
Especially from 22 ownards.


https://www.fiatforum.com/panda/317388-panda-eco-1-1-2010-misfire-fix.html

also try strapping the ECU plugs down with long tie wraps.
simple cheap and easy...worth a try.

Even if it turns out as not the cause, this is well worth doing anyway.

https://www.fiatforum.com/panda/461290-1-1-misfire-loss-power.html

Does anyone know if a low battery on Panda 1.1 ECO Active 2007 could result in OBD fault P0352 ? Car has new: Plugs, HT leads, Coil Packs. Battery recently gave out and not sure if might be the cause. Otherwise, I face picking away at the wiring loom in search of some damage or dodgy connection, needle in a haystack with poor access.

just had this error on 1.1 now fixed

I swapped the coils over and the code changed. which is where I would start

followed by a visual inspection at night for arcing. ( a blue regular spark not random white sparkling which is normal with damp in the atmosphere)


on mine the resistance of the two pins was different on the faulty coil


Don't assume the new parts are working. Check everything twice

I changed the battery because it was really shot; was only giving 5 volts and getting quite hot under charging. I cleaned-up the connections to the battery and also the earth nutted onto the side of the ECU. After fitting the new battery which, gave 12v with engine off and 14v with engine running, I could not record a fault and nor did it misfire on a test run. Have a strong sense the P0352 ignition fault was all down to a dead battery. Will update further if the problem resurfaces. I think the original battery was the factory fitted one; 68k miles and 12 years ago so, no real complaints.

Daw! Engine light came on again. I was really hopeful but turns out to have been fools gold. Sure enough P0352 indicated on the OBD test. Slight misfire newly manifested. One suspicion is that problem was temporarily eradicated by having pulled off and manipulated and then replaced ECU wire plugs. Cannot be sure of anything at this point. Panda Panda Panda....

MarcelloR said:

Daw! Engine light came on again. I was really hopeful but turns out to have been fools gold. Sure enough P0352 indicated on the OBD test. Slight misfire newly manifested. One suspicion is that problem was temporarily eradicated by having pulled off and manipulated and then replaced ECU wire plugs. Cannot be sure of anything at this point. Panda Panda Panda....

Click to expand...

The 1.1 has a known fault in the wiring to the ECU. Until that's sorted any fault codes are likely to be fibs.

The fix involves careful inspection with a magnifier and sorting out the damaged wire or contact. The cable bundle should be supported but bear in mind it has to flex with engine movement so don't clip it too tight.

Hmmm... yes. Suspicious that what you say id TRUE because there had been a correlation with bumps in the road and conk-outs/misfires. DaveMcT, can you be specific about the "known fault". Who knows it & what is it?

If you search the forum there are lots of references from people more knowledgeable than me.

https://www.fiatforum.com/search.php?searchid=9632367

clear the codes

swap the coil and leads over

drive car until a check light appears


Read the code.


if its the same suspect the wiring

if its different its one of the parts you swapped

a corrosion on the cable connector might be the issue

I suggest unplug the cable connectors of the coil and use electric contact spray

DaveMcT said:

The 1.1 has a known fault in the wiring to the ECU. Until that's sorted any fault codes are likely to be fibs.

The fix involves careful inspection with a magnifier and sorting out the damaged wire or contact. The cable bundle should be supported but bear in mind it has to flex with engine movement so don't clip it too tight.

Click to expand...

Yes! The wire-bundle that goes into the "shoe" connector to the ECU; when tugged or pushed sets the engine running on 2 or 4 cylinders. So, it seems that the connection from harness to ECU at the plug is the fault. I haven't been able to find a replacement plug online though? No obvious way to tighten-up the contacts which, are very small and disappear down a tiny hole.

Has anyone ever mended one of these?

long cable ties are the normal fix.

Bit of a bodge but seems to last well

MarcelloR said:

Yes! The wire-bundle that goes into the "shoe" connector to the ECU; when tugged or pushed sets the engine running on 2 or 4 cylinders. So, it seems that the connection from harness to ECU at the plug is the fault. I haven't been able to find a replacement plug online though? No obvious way to tighten-up the contacts which, are very small and disappear down a tiny hole.

Has anyone ever mended one of these?

Click to expand...

If you unpeel the loom wrapping tape you can use fine pointed pliers to gently tug each wire and find the faulty wire. The pin itself may well be ok but you will feel or see it move if it's loose. Ditto any broken conductors inside the insulation.

Fix the fault and re-wrap the loom and make sure it's well supported. Use self amalgamating tape as ordinary PVC insulating tape soon goes sticky and messy.

I spoke to the Connector-Plug manufacturer Tyco and they said the part was obsolete; probably manufactured exclusively for the motor manufacturer. I am now trying to contact Magneti Marelli who make the ECU type IAW 4AF.SS
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I thought I had found a re-manufacturer in Cannock at https://www.atpelectronics.co.uk/https://www.atpelectronics.co.uk/ but said that they didn't make a plug for that ECU though, they had some that came close.

Try ECU Testing Ltd who have had some good reviews.

[ame="https://twitter.com/MarelliTech/status/1215218578963730433"]https://twitter.com/MarelliTech/status/1215218578963730433[/ame]

Form the less than helpful Mageti Marelli