Repainting an aluminium engine block
ALFA ROMEO 156 (932)
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19.10.23 Back to topics
Magneti Marelli ignition coils
ALFA ROMEO 156 (932)
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DACIA SANDERO 1.2 16V@user_330977 Jul 30, 2021MemberI replaced all 4 Bosch ignition coils on my 2005 Alfa 156 JTS with brand new Marelli coils, and am now getting a constant “check engine” MCSF warning light.
These were put into the car a few days ago and although the car runs fine, the check engine light is constantly on and I am getting faut codes P0351 – P0354 No Signal Present – on all 4 of the Marelli coils. This did not happen with the Bosch ignition coils previously fitted and has only occurred when these were changed to the Marelli ones.
No other faults show up, other than these – the car apparently runs fine because it is on the emergency program, but the fault codes cannot be permanently deleted simply by clearing codes with the scanner.What is the solution to this issue – grateful for assistance.
Reply 30.07.21 
03.08.21 - @Anna Johnson Aug 03, 2021AUTODOC expertCauses of the P0351 codeDefective spark plugs or damage to tied wiresIgnition coil defectiveDefective ECMShort circuit or open circuit in the ignition coil wireBad electrical connectionWhat repairs can fix the P0351 code?Replacing spark plugs and related wiresReplacing the ignition coilRepair or replace worn or damaged electrical wiresRepair or replace the damaged electrical connectorReplacing the engine control unit——————P0354The P0354 code indicates that the vehicle PCM is not receiving the required signals from the ignition coil or coils while the vehicle is in use. This could indicate a problem with the primary or secondary winding of the coil.To resolve the P0354 code, you may need to:Eliminating intake manifold vacuum leakageRepair or replace worn or damaged ignition coil wires (or coils)Replacing one or more spark plugsRepair or replacement of one or more ignition coilsReply
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