P0048 OBD-II Trouble Code: Turbo/Super Charger Boost Control Solenoid Circuit High

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0048 code

P0048 is a diagnostic trouble code (DTC) for "Turbo/Super Charger Boost Control Solenoid Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0048 DIAGNOSTIC Get a fair and transparent estimate upfront

P0048 Trouble Code definition

Turbo/Super Charger Boost Control Solenoid Circuit High

What the P0048 code means

This code has varied definitions as provided by the manufacturer. The code means that the ECU (Engine Control Unit) has detected an out of range or abnormal reading of too high operation in the turbocharger or supercharger boost control solenoid circuit. This code is related to the electrical circuit A as an area of the boost solenoid system circuit, as opposed to a particular malfunction or component.

What causes the P0048 code?

  • Vacuum system leak on the intake manifold or boost control

  • A defective air cleaner

  • The waste gate is stuck closed

  • Loose connection or bad gasket between the exhaust manifold and the turbocharger flange

  • A restrictive connection between the turbocharger and the air intake connection

  • A bad boost pressure sensor

  • Shorted or open wiring in the boost sensor circuit

  • Loose, corroded, or disconnected electrical connectors in the boost sensor 5-volt reference circuit

  • Damaged turbo charger (usually caused by internal oil leaks and oil supply problems which can lead to bearing failure and blade damage)

What are some of the symptoms of P0048 code?

  • Low or no boost

  • Loss of power during acceleration.

  • Check Engine Light illumination once ECM has detected solenoid circuit high current condition (indicates open circuit)

How does a mechanic diagnose the P0048 code?

  • Checks for the engine warning light that illuminates on the dash instrument display
  • Uses an OBD-II scanner to find the code
  • Resets the code and road tests the vehicle to see if the code returns

If the P0048 code returns, the mechanic should then follow this test procedure:

  • Inspect the turbo/super charger system with close attention to the solenoid valve and waste gate (could be be inoperative or stuck)

  • Inspect the wiring on the boost sensor and related wiring for loose connections, damaged wiring, or faulty sensor

  • Check the boost pressure during operation and driving for normal range of 9 to 14 PSI pressure (ensures that pressures is not erratic or too high)

  • Inspect the turbo charger for damaged blades, wobbly shaft rotation, worn bearings, oil leaks into turbo boost side, and correct control valve or waste gate operation

Common mistakes when diagnosing the P0048 code

Do not replace any component, assuming it is bad, without carefully inspecting the system. Be sure to flush all debris and obstructions from the turbocharger oiling system that can lead to repeated turbo failure related to the bearings on the turbocharger shaft. Replacing the turbocharger without complete testing of the by-pass valve or waste gate function and electrical circuitry is also the cause of common misdiagnosis.

How serious is the P0048 code?

This code is very serious and is usually preceded by the engine warning light coming on. It should be diagnosed as soon as possible to prevent engine internal damage or turbocharger failure. Minimize your driving until the problem can be repaired. If the vehicle operates very poorly, do not drive it further.

The vehicle can run roughly or erratically, backfire, have rich or lean fuel consumption problems, and operate in over or under boost conditions.

Often times, if the engine warning light comes on immediately at start up, the OBD- II system can be reset and the vehicle will operate normally.

What repairs can fix the P0048 code?

The P0048 code can be very confusing and mean that the boost is too high, or the output voltage to the ECU is too high. Simply eliminate this as a cause by checking to see if the boost pressure is in range and operating smoothly. Conditions under load are when this situation happens. The boost pressure sensor is very important to the fuel management system to control the quantity of fuel.

After some age and miles, the sensors fatigue and begin to gradually read out of range, usually requiring replacement. Mechanics often have the experience of working on so many vehicles that they can sense which components have a higher probability of failure.

Additional comments for consideration regarding the P0048 code

Many vehicles with mileage over 100,000 have momentary sensor problems that usually occur during start up or prolonged stress situations on the drive train. If the engine warning light comes on and the vehicle seems to be operating normally, the OBD-II system can be reset using the scanner and the problem may not reoccur. This is why it is important to verify the fault and reset it before doing any repairs.

Need help with a P0048 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0048

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0048 code.

SCHEDULE P0048 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,144)

Rating Summary
5,685
221
51
35
152
5,685
221
51
35
152

Chris

11 years of experience
13 reviews
Chris
11 years of experience
Ford F-150 - Check Engine Light is on - North Salt Lake, Utah
We were having problems with our check engine light, and Chris was exceptionally thorough until he found the problem and could help resolve the situation. We appreciate having someone who cares enough to get the job done right, not just done. We will definitely use Chris' services in the future. Thanks Chris.

Leng

21 years of experience
2 reviews
Leng
21 years of experience
Mazda MPV - Check Engine Light is on - Seattle, Washington
Leng arrived on time and explained the issue that my van is having. I will make a follow up appointment for the fix. Friendly, easy to talk to, and professional - thank you very much!

Okela

13 years of experience
11 reviews
Okela
13 years of experience
Land Rover LR4 - Check Engine Light is on - Brooklyn, New York
Okela was incredible! He is super thorough and took time to walk us through the issues with our LR4. Couldn’t recommend more! Thank you Okela!!

Robert

37 years of experience
188 reviews
Robert
37 years of experience
Land Rover LR2 - Check Engine Light is on - Atlanta, Georgia
Robert arrived on time. Did a diagnostic check quickly. He was friendly, and gave great service. He knows how to work on a Land Rover.


More related articles

B1220 OBD-II Trouble Code: Fuel Tank Pressure Sensor Circuit Open
B1220 means there is a circuit issue in the vehicle's fuel tank pressure sensor, likely caused by faulty wiring.
P2058 OBD-II Trouble Code: Reductant Injector Circuit High Bank 2 Unit 2
Diagnostic Diagnostic Trouble Code (DTC): P2058 P2058 code definition Reductant Injector Circuit High Bank 2 Unit 2 What the P2058 code means P2058 is an OBD-II generic code for the engine control module (ECM) detecting the reductant injection air pump...
P0076 OBD-II Trouble Code: Intake Valve Control Solenoid Circuit Low (Bank 1)
P0076 P0076 code definition Intake Valve Control Solenoid Circuit Low (Bank 1) What the P0076 code means P0076 is an OBD2 code that indicates an issue with the Bank 1 intake valve control solenoid circuit. This tells us that the...

Related questions

Check Engine Codes P0014 and P054A

Both Codes refer to a problem with the variable valve timing mechanism. The issue could be mechanical (basic timing is off), hydraulic (VVT relies on engine oil pressure), or electrical (there are solenoids, wiring, terminals). Regardless of the issue, there...

ABS light error codes

Hello. The ABS fuse will be located in the central junction box inside of the engine bay of your 2005 Ford E-250. It is likely that you have a short somewhere that is causing fuses to blow or interrupting another...

Check Engine Light is on - 2007 Toyota Sienna

This code relates to a heated oxygen sensor which is a unit inside your exhaust system that reads exhaust gases and relays this information to the car's computer. The computer uses this information to make adjustments to fueling. This sensor...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com