What usually causes it
- A wastegate or boost control valve stuck closed, which are the parts that limit boost
- A cracked, blocked or loose vacuum hose to the boost control
- A bad boost pressure sensor
- A faulty turbo control actuator
P0234Starts at: Get it checked this week
Turbo is making too much boost
A turbo is a small air pump driven by the exhaust that forces extra air into the engine. Boost, the extra air pressure, went above the limit the computer set.
What to watch for
- A sudden rush of power followed by a loss of power
- The car goes into a low power mode
- Smoke, a burning oil smell or a loud whistle
Can I keep driving?
We rate P0234 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0234
What does P0234 mean?
Turbo is making too much boost. A turbo is a small air pump driven by the exhaust that forces extra air into the engine. Boost, the extra air pressure, went above the limit the computer set.
Can I keep driving with P0234?
We rate P0234 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0234?
The most common causes, in order: A wastegate or boost control valve stuck closed, which are the parts that limit boost; A cracked, blocked or loose vacuum hose to the boost control; A bad boost pressure sensor; A faulty turbo control actuator.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.