Turbo/Super Charger Boost Control Solenoid Circuit High
The P0048 code means the vehicle's onboard diagnostic system has detected: Turbo/Super Charger Boost Control Solenoid Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $600 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Overboosting condition possible
- Engine may enter limp mode
- Turbo surge or compressor noise
Probable Causes (Ranked by Likelihood)
- Short circuit in boost control solenoid wiring Very High
- Internally shorted boost control solenoid High
- Water or debris in solenoid connector Moderate
- ECM output driver failure Low
Step-by-Step Diagnostic Procedure
-
Confirm P0048 with scan tool and review freeze frame data
-
Inspect wiring to boost control solenoid for shorts to power
-
Measure solenoid resistance and check for internal short
-
Check connector for moisture or contamination
Frequently Asked Questions
What does P0048 mean?
P0048 indicates a high voltage condition in the turbo or supercharger boost control solenoid circuit, which could lead to an overboosting condition.
Is P0048 dangerous?
P0048 can potentially cause overboosting, which is harmful to engine components. The ECM usually enters limp mode to protect the engine, but prompt repair is strongly recommended.
How do I fix P0048?
Common fixes include repairing a short circuit in the solenoid wiring, replacing the boost control solenoid, or clearing moisture from the connector.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0048 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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