Hello

[Budge1]

Hi
Recently purchased a Fiat 500 2010 1.2 petrol and having starting problems
Throwing injector and coil along with ABS/EBD failure
Codes P0201-11, P0202-11, P0203-11, P0204-11
P0351-14, PO352-14, P0353-14, P0354-14
Also C1221-86
Had a new battery and mainearth lead Also replaced a broken serpentine belt
Intermittent as managed to clear all codes and fired up and ran perfectly no codes
Then following won't start and throwing same codes
Not sure where to go with this, any ideas welcome
Cheers
Martin

 

[bugsymike]

Many of those codes point to a connection/voltage possible fault at or to the ECU, which can be related back to your battery problem.
If a poor connection at battery or earthing leads, it can cause a reduction in the voltage to the ECU which is very fussy about that.
If you have Stop/Start system it must have the correct battery fitted and be installed in the correct way according to the owners handbook.
The other errors are stopping power to all the injectors and all the ignition coils/spark plugs.
I found this on another site which does point in the battery/voltage area. Sorry you have to page down a bit to read it.:-

• 
  ABS (Anti-Lock Braking System) 1 problems exist
  1.C1221-86 Engine Control Module (ECM) - Signal Invalid Active
  
  Low voltage -ESC light is on!
  
  Tags: None
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  noc
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  #2
  09-18-2020, 04:45 PM
  Update. Still couldn't find any info and don't know why this was an ACTIVE code. Then I read in another thread about low battery but my battery was new and my car starts right up. I tested the battery, it was a bit low, so I charged it and check the battery terminals. The neg was on tight, the pos was a bit loose. Reseat it and tighten it. Reset the car, no more active codes. No more codes. Everything is back to normal. Battery was the key problem to this issue.