GM Volt Forum banner
1 - 3 of 3 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
i had a code p0420 catalytic converter, i replaced brand new and two sensors too , due to loss and reduce propulsion ,when switch to gas mode as driving , after new replaced parts made and test drive , it felt again throwing code P0AC4 and P16E0
The tech said the new catalytic is blocked ,because get so warm and red , also he said the MAF SENSOR FAILED too
Did anybody knows what will the cause to failed new catalytic issue or now any answer to this issue?
thank you for you help!!
 

·
Registered
2014 Cadillac ELR
Joined
·
810 Posts
On my ELR the cause of the cat failure was no oil flow to the cylinder head. New head, new cat, all better. Good luck....
 
1 - 3 of 3 Posts
Top