P0048
Fix within 1-2 weeksYour engine computer detected a high voltage signal in the electrical circuit for the turbocharger or supercharger boost control solenoid. This solenoid controls how much boost your turbo or supercharger makes.
Code P0048 means your engine computer detected a high voltage issue in the turbo/supercharger boost control solenoid circuit. Common causes: Faulty boost control solenoid (60%), wiring issues (30%). Drivability: Yes, but with reduced power. Repair cost: $100-$300 DIY, $200-$600 professional.
Can I Drive With P0048?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration.
Stop driving immediately if: Flashing CEL, loud noises from the engine/turbo, burning smell, significant power loss that makes driving unsafe.
Symptoms of P0048
- 1Reduced engine power or acceleration
- 2Turbocharger not building boost
- 3Check Engine Light is on
- 4Engine may enter 'limp mode'
- 5Engine may run rough under acceleration
Common Causes of P0048
Parts most likely causing this code, ranked by probability
An internal electrical fault or failure within the solenoid causes the high circuit signal, preventing proper boost regulation.
60% of P0048 cases are fixed by replacing this part
An open circuit, a short to voltage, or corroded/damaged connectors in the wiring to the boost control solenoid will trigger this code.
30% of P0048 cases are fixed by repairing the wiring
A rare internal fault in the computer itself can send an incorrect signal or misinterpret the solenoid's signal.
10% of P0048 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the boost control solenoid and its electrical connector for any obvious damage, corrosion, or loose connections.
- Check the wiring harness leading to the solenoid for any visible cuts, chafing, or signs of rodent damage.
How to Diagnose P0048
- 1Visually inspect the boost control solenoid and its electrical connector for damage, corrosion, or loose connections.
- 2Check the wiring harness leading to the solenoid for any signs of fraying, cuts, or shorts.
- 3Using a multimeter, test the resistance of the boost control solenoid across its terminals and compare to factory specifications.
- 4With the engine off, check for continuity and voltage at the solenoid connector to ensure proper power and ground signals from the PCM.
- 5If accessible, manually operate the wastegate arm to ensure it moves freely and isn't stuck.
- 6Use a scan tool to monitor boost pressure and solenoid command values while driving, if possible, to confirm solenoid operation.
P0048 on Popular Vehicles
Ford F-150
2011-2024The boost control solenoid (wastegate solenoid) is a common failure point on EcoBoost engines, leading to P0048. The wiring harness can also become brittle or corroded.
80% fixed by replacing solenoid or repairing wiring
Honda Civic
2016-2024While less common than Ford, Honda's 1.5L turbo engines can experience P0048 due to a faulty boost control solenoid or issues with its electrical connector.
75% fixed by replacing solenoid or repairing wiring
Chevrolet Silverado
2019-2024The 2.7L turbo engine in Silverado and Colorado can trigger P0048 if the boost control solenoid or its associated wiring develops an electrical fault.
70% fixed by replacing solenoid or repairing wiring
Frequently Asked Questions
What does P0048 mean?
P0048 indicates that your engine's computer has detected a high voltage condition in the electrical circuit for the turbocharger or supercharger boost control solenoid, which manages boost pressure.
Can I drive with P0048?
Yes, you can drive with P0048, but expect reduced engine power and acceleration. Avoid heavy acceleration or towing, as the turbocharger may not be functioning correctly.
Will P0048 clear itself?
No, P0048 will not clear itself. The engine computer will keep the Check Engine Light on until the underlying electrical fault with the boost control solenoid circuit is diagnosed and repaired.
How do I fix P0048 myself?
Start by inspecting the boost control solenoid's wiring and connector for damage. If the wiring is good, test the solenoid's resistance with a multimeter. If it's out of specification, replace the boost control solenoid.
How much does it cost to fix P0048?
DIY repair costs for P0048 are typically $100-$300 for a new boost control solenoid. Professional repair costs range from $200-$600, including parts and labor.
P0048 keeps coming back - why?
If P0048 keeps returning, it often means the initial diagnosis missed the true cause. Re-check the entire wiring harness for intermittent shorts or opens, ensure the new solenoid is functioning correctly, or consider a rare PCM issue.
Will P0048 fail emissions/smog test?
Yes, P0048 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most testing jurisdictions.
What's the difference between P0048 and P0047?
P0048 indicates a 'high' circuit condition (open circuit or short to voltage) for the boost control solenoid, while P0047 indicates a 'low' circuit condition (short to ground or open circuit with low voltage). Both point to an electrical issue with the same component.
P0048 on Ford EcoBoost?
P0048 is common on Ford EcoBoost engines (e.g., F-150, Escape, Fusion) due to the boost control solenoid (often called a wastegate solenoid) failing or its wiring becoming brittle over time.
Questions to Ask Your Mechanic
Did you test the resistance of the boost control solenoid and compare it to factory specs?
Good answer: Yes, the solenoid's resistance was X ohms, and the factory spec is Y ohms, indicating it's faulty/within spec.
Did you check for voltage and ground at the solenoid connector with the key on?
Good answer: Yes, we confirmed proper voltage and ground signals are reaching the connector, so the issue is likely the solenoid itself.
Repair Cost Estimate
DIY Repair
Parts only
$100-$300
Shop Repair
Parts + labor
$200-$600
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic mechanical skills, a multimeter for electrical testing, and potentially a scan tool for advanced diagnostics.
Cost of Waiting
Ignoring P0048 means your engine will continue to operate with reduced power and potentially incorrect boost levels. This can lead to increased fuel consumption, poor drivability, and in severe cases, could put stress on the turbocharger or other engine components, leading to more expensive repairs down the road. A $200 solenoid fix now prevents potential turbocharger damage ($1,000-$3,000 repair).
While You're In There...
If the solenoid uses vacuum or pressure lines, inspect them for cracks, leaks, or blockages, as they are often routed near the solenoid and can degrade over time.
Ensure all clamps on boost hoses are tight and secure to prevent boost leaks, which can sometimes mimic or exacerbate boost control issues.
Tools You'll Need
- Basic hand tools (sockets, wrenches, screwdrivers)
- Multimeter
- Wire strippers/crimpers (if wiring repair is needed)
- Scan tool (optional, for monitoring live data)
P0048 is a common turbocharger-related code, and in most cases, it's a straightforward fix involving replacing a faulty solenoid or repairing a wiring issue. Your engine will regain full power once repaired.
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Your Next Steps
Step 1: Visually inspect the boost control solenoid's electrical connector and the wiring harness for any damage, corrosion, or loose connections. Ensure the connector is fully seated.
Step 2: If the visual inspection doesn't reveal any issues, use a multimeter to test the resistance of the boost control solenoid. Compare the reading to your vehicle's service manual specifications. If it's outside the specified range, the solenoid is faulty.
Step 3: If the solenoid tests good, check for proper voltage and ground at the solenoid's electrical connector with the key on. If power or ground is missing, trace the wiring back to the ECM/PCM to find the open or short.