Skip the auto shop - Our mechanics make house calls

P0248 OBD-II Trouble Code: Turbocharger Wastegate Solenoid B Range/Performance

P0248 code definition

This DTC refers to Turbocharger Wastegate Solenoid B Range/Performance.

What the P0248 code means

In a turbocharged vehicle, the wastegate diverts exhaust by opening and closing to a certain degree and at certain times. This helps regulate maximum boost pressure, and offers a safeguard to protect the engine as well as the turbocharger itself.

P0248 indicates that the wastegate solenoid circuit has sent a signal to the PCM (powertrain control module) which is outside of the expected voltage, according to the manufacturer’s specifications. This signal tells the PCM that the solenoid is not controlling wastegate activity in the intended manner.

What causes the P0248 code?

Possible causes of this fault include:

  • A faulty wastegate solenoid
  • Faulty solenoid wiring or connections
  • An open or short in the wastegate solenoid B harness
  • A wastegate door that is stuck too far open or closed
  • A faulty PCM (rare)

What are the symptoms of the P0248 code?

Aside from a stored code and lit malfunction indicator lamp (MIL), there may be rattling or whining in the turbocharger or its pipes, abnormal exhaust smoke, hissing from the wastegate or hoses, poor engine performance, and/or spark plug fouling. In addition, the engine or transmission may get too hot. Other DTCs may present, such as engine misfire, knock sensor, or other turbocharger codes. If the vehicle is equipped with a boost pressure gauge, it will show excessively high boost pressure levels.

How does a mechanic diagnose the P0248 code?

The following may be required to find the source of this fault:

  • Hooking a code reader up to check for other faults and to record freeze frame data
  • Clearing any DTCs, then road testing the vehicle to see if they return
  • Diagnosing and repairing any codes which occurred along with P0248, in the order in which they occurred
  • Visually inspecting the wastegate solenoid B and its wiring and connectors
  • Checking solenoid voltage and resistance against the manufacturer’s specifications
  • Inspecting the wastegate door to see if it’s stuck
  • Observing the wastegate door and actuator rod while activating the vacuum pump

Common mistakes when diagnosing the P0248 code

The actuator rod and other involved components are easy to overlook when diagnosing this code. Simply replacing the wastegate solenoid without also making sure that the circuitry is sound and that the wastegate door isn’t stuck may result in repeated solenoid circuit failure.

Another mistake is failing to repair any concurrent boost pressure sensor fault codes. These should be rectified before moving on to fix the wastegate solenoid circuit.

How serious is the P0248 code?

This malfunction most likely will not cause serious damage to other vehicle components, but it could cause problems which affect how well the vehicle runs. If the wastegate solenoid problem is accompanied by a stuck wastegate door, a constant boost condition may result, compromising drivability.

What repairs can fix the P0248 code?

A wastegate solenoid B malfunction may be solved by:

Additional comments for consideration regarding the P0248 code

Due to the customized nature of a turbocharged system, there is no predefined layout by which the wastegate solenoids are arranged. “B” simply refers to one of the solenoids in a group which work in sequence – there is no set position where this particular solenoid resides. This means that it’s important to have the relevant documents, including a wiring diagram, for your particular system.

If you’re attempting this repair yourself, don’t forget to retest the system with a scanner once you’ve completed the job. In some cases, a malfunction has multiple causes and fixing just one will result in the DTC returning, in which case you would have to start the diagnostic and repair process all over again.

Need help with a P0248 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...


Related questions

Q: Wont start

You should have the vehicle scanned for codes to see if you have codes to the camshaft or crankshaft sensors. Either of these may cause the no spark condition. If the fuel pump regulator is bad, then you would...

Q: Can an open gas cap which causes the Check Engine Light to come on cause the car to not start and the ECM to appear bad?

Yes, there are a lot of things a bad gas cap or open gas cap can affect. If you don't have a gas cap then you may be experiencing issues with debris getting into your tank or fuel filter and...

Q: Problem starting after fueling have to give it to start

Hello. All modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the...