PO352, PO353 Codes

Question

My 2008 GMC inline 6 is giving me these codes and missing.
Plugs have 91K on them..
Changed coils#2 & #3 (new)
Changed plugs 2 & 3
No symptoms change. Codes come back after clearing.

Need suggestions.

Thanks,
Steve D

Answer 1

P0352 Igntion coil 2 control circuit

P0353 Igntion coil 3 control circuit

These are circuit low codes. the ignition coil has 2 wire the PNK wire has to have battery voltage if that not there you do further inspection , If you have any di-electric grease on the sparkplug remove it and retest it.

​ Here the diagram there battery voltage that goes to the ignition coil , what set this code is the ground signal from the ECM if it is not sufficient.