What is Engine Overboost condition?


Service engine code P0234 means engine Overboost condition. It happens due to several reasons and mechanical failures that need to be fixed immediately the code is displayed. P0234 is displayed when the engine control module senses intake boost pressure more than 4 psi longer than 5 seconds.



Causes of P0234 Error Code


▪         Damaged or clogged supercharger/turbocharger wastegate
▪         Clogged wastegate control valve solenoid
▪         Blocked wastegate control hose which results in poor detection of boost pressure

Symptoms of Overboost pressure


▪         Check engine light flashes repeatedly and some systems display P0234 error code
▪         Faulty engine seals or head gaskets
▪         Damaged seal or gasket due to excessive boost pressure inside the engine

Diagnosis and fixing of engine Overboost pressure condition


▪         Reviewing the data collected by the engine control module
▪         Resetting the code to check whether the problem comes back
▪         Checking the condition and operation of boost pressure solenoid to ensure the proper functioning of the wastegate
▪         Cleaning of clogged wastegates

To avoid wrong diagnosis service engine code P0234the following guidelines should be kept in mind

▪         Checking the boost pressure sensor holes for blocks and damages
▪         Sometimes Overboost condition is displayed due to incorrect input voltage

The intake pressure of the engine is increased to obtain more power from the engine. The condition causes damage to the structural integrity of the engine and may lead to severe engine failures like a blown head gasket or blown engine block.
 

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