The most common repairs to resolve a P0234 are:
Confirm the code with an OBD-II scanner, and reset the diagnostic code. ...
Replace defective boost pressure sensor (common)
Replace turbocharger or supercharger wastegate.
Repair or replace damaged wastegate hoses, removing any kinks or blockages.
More items...•16 Mar 2022
https://www.fixter.co.uk › blog › o...
OBD-II Trouble Code: P0234 Engine Overboost Condition - Fixter
From a google search....also a long thread on Lost Jeeps.....in relation to the code