P0234 on Renault
Turbo/Supercharger Overboost Condition
P0234 on Renault vehicles indicates turbo/supercharger overboost condition. Au7o has documented this code across 1 Renault model — most commonly on Captur. P0234 means the engine computer detected an overboost condition — the turbocharger or supercharger produced more boost pressure than the system allows. The computer monitors manifold/boost pressure and compares it to a safe target; when boost exceeds the threshold (or rises too fast), it sets this code, often cutting power to protect the engine. Excess boost can stress pistons, gaskets, and other components, so the system typically enters a reduced-power 'limp' mode. It generally points to a stuck or malfunctioning boost-control component rather than an internal engine fault. Typical repair costs on Renault range from $200 to $1,200, depending on the specific model and root cause.
Common Causes of P0234
- •Stuck or faulty wastegate (mechanical or stuck closed)
- •Faulty boost / wastegate control solenoid
- •Stuck or faulty turbocharger bypass / blow-off valve
- •Disconnected, cracked, or leaking boost control vacuum hoses
- •Faulty boost pressure (MAP) sensor giving false readings
- •Failed or stuck variable-vane (VGT) turbo mechanism
- •Wiring or connector fault in the boost control circuit
P0234 on Renault by Model
Renault Captur(1 issue)
- TCe Turbocharger Issues2013-2026
The small-displacement TCe turbo engines in the Captur suffer from turbo wastegate rattle and oil seal leaks. The wastegate actuator arm develops play, causing a rattling noise at idle and under light load.
Looking for P0234 on a different make?
View P0234 across all makes →Frequently Asked Questions
What does P0234 mean on Renault?▼
P0234 stands for "Turbo/Supercharger Overboost Condition." P0234 means the engine computer detected an overboost condition — the turbocharger or supercharger produced more boost pressure than the system allows. The computer monitors manifold/boost pressure and compares it to a safe target; when boost exceeds the threshold (or rises too fast), it sets this code, often cutting power to protect the engine. Excess boost can stress pistons, gaskets, and other components, so the system typically enters a reduced-power 'limp' mode. It generally points to a stuck or malfunctioning boost-control component rather than an internal engine fault. On Renault specifically, this code is documented across 1 model.
What causes P0234 on Renault vehicles?▼
Common causes on Renault: Stuck or faulty wastegate (mechanical or stuck closed), Faulty boost / wastegate control solenoid, Stuck or faulty turbocharger bypass / blow-off valve, Disconnected, cracked, or leaking boost control vacuum hoses, Faulty boost pressure (MAP) sensor giving false readings. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0234 on a Renault?▼
Repair costs on Renault range from $200 to $1,200, depending on the specific model and root cause.
Which Renault models have P0234 documented?▼
Au7o has documented P0234 on 1 Renault model: Captur.