What does P0046 mean?
The turbo boost control solenoid or actuator controls how much boost the turbocharger makes, through a wastegate or variable vanes.
The part is electrically connected, but it is not doing what the computer commanded.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Low power or limp mode
- Overboost surging
Common causes
- Sticking or worn component
- Restricted passage or linkage
- Wiring with high resistance
- Low battery or charging voltage
- Failed boost control solenoid or actuator
- Wiring problem
- Sticking wastegate or vanes
How to diagnose P0046
- Command the component with a scan tool and watch whether it responds.
- Check the component's actual movement or flow.
- Inspect wiring and voltage supply.
- Command the actuator with a scan tool and watch it move.
- Check solenoid resistance and wiring.
How to fix it
- Replace the solenoid/actuator
- Repair wiring or vacuum lines
- Free up or repair the wastegate or vanes
Estimated repair cost
Likely repairs for P0046 run from about $150 to $1,800, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Wastegate/boost control solenoid | $150 - $500 |
| VGT actuator / vane service | $500 - $1,800 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0046?
Moderate severity
Drive gently. Overboost can damage the engine.
P0046 FAQ
What does P0046 mean?
P0046 stands for "Turbocharger/Supercharger Boost Control "A" Circuit Range/Performance". The turbo boost control solenoid or actuator controls how much boost the turbocharger makes, through a wastegate or variable vanes.
Can I drive with a P0046 code?
Drive gently. Overboost can damage the engine.
How much does it cost to fix P0046?
It depends on the cause. The likely repairs for P0046 range from about $150 to $1,800 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0046?
The most common causes are: sticking or worn component; restricted passage or linkage; wiring with high resistance.