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

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0248 code

P0248 is a diagnostic trouble code (DTC) for "Turbocharger Wastegate Solenoid B Range/Performance". 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 P0248 DIAGNOSTIC Get a fair and transparent estimate upfront

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.

trouble codes
Check Engine Light
P0248

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0248 code.

SCHEDULE P0248 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0927 OBD-II Trouble Code: Gear Shift Reverse Actuator Circuit High
P0927 code means the ECM detected a higher than normal voltage within the gear shift reverse actuator often due too mechanical issues.
P2633 OBD-II Trouble Code: Fuel Pump B Control Circuit Low
P2633 code has a problem with fuel pump B control circuit often due to a bad fuel pump, faulty fuel pump relay, or broken ground wire.
P2065 OBD-II Trouble Code: Fuel Level Sensor B Circuit
P2065 means there was an irregular voltage signal from one of the fuel level sensors due to wiring issues, a damaged fuel tank or a faulty cluster.

Related questions

P0133 code change O2 sensor two times still sets the same code after about 200 miles.

Hi there. From the description you have given, for your vehicle's P0133 code (O2 sensor slow response). It could be an exhaust leak near the O2 sensor causing the O2 slow response code. An exhaust leak could draw air in...

Check Engine Light is on with the P0451 code

Hi there: Unplugging the fuel tank pressure system would unleash an entirely different set of problems - mainly the truck wouldn't start. This error code typically indicates that the EVAP vent solenoid is damaged or faulty, which creates excess pressure...

Engine noise when cranking. P0011 and P0021 codes

Hi there. The P0011 OBD-II error code indicates that you have an over advanced timing issue, which might be the reason why your engine stumbles for a brief moment when it's cold and first starts. Ignition timing is typically monitored...

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.

1-800-701-6230 · hi@yourmechanic.com