What does P0048 mean?
The turbo boost control solenoid or actuator controls how much boost the turbocharger makes, through a wastegate or variable vanes.
The control circuit voltage is higher than expected, usually a short to power or an open circuit.
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
- Control wire shorted to voltage
- Open component or wiring (on some designs)
- Failed driver in the module (less common)
How to diagnose P0048
- Unplug the component and check the control wire for voltage with the key on.
- Measure component resistance against spec.
- 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 P0048 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 P0048?
Moderate severity
Drive gently. Overboost can damage the engine.
P0048 FAQ
What does P0048 mean?
P0048 stands for "Turbocharger/Supercharger Boost Control "A" Circuit High". 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 P0048 code?
Drive gently. Overboost can damage the engine.
How much does it cost to fix P0048?
It depends on the cause. The likely repairs for P0048 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 P0048?
The most common causes are: control wire shorted to voltage; open component or wiring (on some designs); failed driver in the module (less common).