P0248
Fix within a few daysThe engine computer detects a problem with the turbocharger or supercharger wastegate control solenoid 'B' not performing as expected.
Code P0248 means your engine's wastegate solenoid 'B' isn't working right. Common causes: Faulty solenoid (60%), vacuum leaks (20%), wiring issues (10%). Drivability: Limit driving, fix within a few days. Repair cost: $60-$230 DIY, $150-$400 professional.
Can I Drive With P0248?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration. Expect reduced power.
Stop driving immediately if: Flashing CEL, loud noises from the engine, burning smell, significant power loss or engine stalling.
Symptoms of P0248
- 1Check Engine Light is on
- 2Reduced engine power or 'limp mode'
- 3Poor acceleration
- 4Engine may feel sluggish or unresponsive
- 5Unusual whistling or hissing noises from the engine bay (less common, but possible with vacuum leaks)
Common Causes of P0248
Parts most likely causing this code, ranked by probability
The solenoid itself is faulty, either electrically or mechanically, preventing proper control of the wastegate actuator.
60% of P0248 cases are fixed by replacing this part
Leaking, cracked, or disconnected vacuum lines or boost hoses prevent the wastegate actuator from receiving the correct pressure signal.
20% of P0248 cases are fixed by repairing these lines
Damaged, corroded, or loose wiring and connectors can prevent the solenoid from receiving power or signal.
10% of P0248 cases are fixed by repairing wiring
The wastegate actuator itself may be stuck or faulty, or the internal wastegate mechanism within the turbocharger is binding.
10% of P0248 cases are fixed by addressing these components
Check These First (Before Buying Parts)
- Visually inspect all vacuum lines connected to the wastegate solenoid and actuator for any cracks, tears, or disconnections.
- Check the electrical connector to the wastegate solenoid for corrosion or loose pins. Wiggle the connector to see if it affects engine behavior (with the engine off).
How to Diagnose P0248
- 1Visually inspect all vacuum lines and boost hoses connected to the wastegate solenoid and actuator for cracks, leaks, or disconnections.
- 2Check the electrical connector and wiring to the wastegate solenoid for damage, corrosion, or looseness.
- 3Using a scan tool, monitor boost pressure and wastegate solenoid duty cycle while driving to observe its operation.
- 4Test the wastegate solenoid's electrical resistance and operation using a multimeter and a vacuum pump.
- 5Apply vacuum directly to the wastegate actuator to ensure it moves freely and holds vacuum.
- 6If all external components check out, inspect the turbocharger's internal wastegate mechanism for binding or damage.
P0248 on Popular Vehicles
Ford F-150
2011-2024EcoBoost engines are prone to wastegate solenoid issues, especially on higher mileage trucks. Vacuum lines can also become brittle and crack.
75% fixed by replacing solenoid or vacuum lines
Chevrolet Silverado
2019-20242.7L Turbo engines can experience P0248 due to boost control solenoid failures or issues with the electronic wastegate actuator.
70% fixed by replacing solenoid or actuator
Subaru WRX/STI
2002-2024Subaru's boost control solenoids (BCS) are common failure points, though P0248 specifically points to a performance issue rather than a circuit fault. Vacuum line integrity is also critical.
80% fixed by replacing solenoid or vacuum lines
Frequently Asked Questions
What does P0248 mean?
P0248 indicates that the engine's computer has detected an issue with the performance or range of the turbocharger or supercharger wastegate control solenoid 'B'. This means the system controlling boost pressure isn't operating correctly.
Can I drive with P0248?
Yes, for short trips only. Your vehicle will likely have reduced power and acceleration. Driving for extended periods with this code can put extra stress on your turbocharger and engine, potentially leading to more expensive repairs.
Will P0248 clear itself?
No, P0248 will not clear itself. The underlying mechanical or electrical issue causing the wastegate solenoid to malfunction must be diagnosed and repaired. Once fixed, the code can be cleared with a scan tool.
How do I fix P0248 myself?
Start by inspecting all vacuum lines and electrical connections to the wastegate solenoid. If they look good, you can test the solenoid's resistance and operation. If the solenoid is faulty, replacing it is a common DIY fix. Ensure you have the correct part for your specific engine.
How much does it cost to fix P0248?
If you do it yourself, replacing a wastegate solenoid typically costs $60-$230 for the part and some basic tools. A professional repair, including diagnosis and labor, usually runs $150-$400. If the turbocharger itself is the issue, costs will be significantly higher.
P0248 keeps coming back - why?
If P0248 keeps returning, it means the root cause wasn't fully addressed. This often happens if a vacuum leak was missed, the wiring issue wasn't completely repaired, or the wastegate actuator or turbocharger itself is binding and wasn't properly diagnosed.
Will P0248 fail emissions/smog test?
Yes, P0248 will cause your vehicle to fail an emissions or smog test. A Check Engine Light being on is an automatic failure in most jurisdictions, and issues with boost control can also affect exhaust emissions.
What's the difference between P0248 and P0245?
P0248 specifically indicates a range or performance issue with wastegate solenoid 'B', meaning it's not operating within expected parameters. P0245 indicates a low circuit voltage condition for wastegate solenoid 'A', pointing to an electrical circuit problem rather than a performance issue.
P0248 on Ford F-150 EcoBoost?
On Ford F-150 EcoBoost engines, P0248 is often related to a failing turbocharger wastegate solenoid or a vacuum leak in the boost control system. These solenoids can degrade over time, leading to inconsistent boost pressure and this code.
Questions to Ask Your Mechanic
Did you test the wastegate solenoid 'B' for proper operation and resistance?
Good answer: Yes, I checked the solenoid's resistance and applied power to confirm it clicks. I also monitored its duty cycle with the scan tool and it wasn't responding correctly.
Did you check all the vacuum lines and boost hoses for leaks or cracks?
Good answer: Absolutely, I performed a visual inspection and a smoke test on the vacuum system and boost lines. I found a small crack near the solenoid connection.
Repair Cost Estimate
DIY Repair
Parts only
$60-$230
Shop Repair
Parts + labor
$150-$400
Save $90-$170 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic hand tools, a multimeter, and ideally an OBD-II scan tool for proper diagnosis and monitoring. Access to the solenoid can be challenging on some vehicles.
Cost of Waiting
Ignoring P0248 can lead to continued reduced engine power and fuel economy. More critically, improper boost control can overstress your turbocharger, leading to premature failure ($1,000-$3,000+ repair), or cause the engine to run rich/lean, potentially damaging your catalytic converter ($800-$2,500 repair). A $100 solenoid fix now prevents a $2,000+ bill later.
While You're In There...
If you're replacing the solenoid, it's smart to replace any brittle or cracked vacuum lines that control it, as they often fail around the same time and are easily accessible.
While not a direct cause of P0248, a faulty boost sensor can sometimes cause misleading boost control issues. If easily accessible during the solenoid replacement, it's a quick check or replacement.
Tools You'll Need
- OBD-II Scan Tool
- Multimeter
- Vacuum pump/gauge (optional, but helpful)
- Socket set
- Screwdriver set
- Pliers
- Flashlight
P0248 is a common code on turbocharged vehicles. Most repairs involve replacing a relatively inexpensive solenoid or fixing a simple vacuum leak, restoring your engine's full power.
- Family-owned since 1957
- 990,000+ happy customers
- Fast nationwide shipping
- Easy returns
Your Next Steps
Step 1: Perform a thorough visual inspection of all vacuum lines, boost hoses, and electrical connections around the turbocharger and wastegate solenoid. Look for any obvious damage or disconnections.
Step 2: If no obvious issues are found, use an OBD-II scan tool to monitor live data, specifically boost pressure and wastegate solenoid duty cycle. This helps confirm if the solenoid is receiving commands and if boost is responding.
Step 3: If the solenoid appears faulty after testing, purchase a new wastegate solenoid 'B' for your specific vehicle. Consider replacing any brittle vacuum lines at the same time.