P0247 DTC code means Turbocharger Wastegate Solenoid B Low. Learn the causes, symptoms, severity, location, repairs, diagnostic steps, common mistakes, and repair costs.
OEM Definition
P0247 is a generic OBD-II powertrain diagnostic trouble code indicating a low electrical condition in the control circuit for Turbocharger Wastegate Solenoid B.
The exact circuit configuration and monitoring strategy can vary by manufacturer. Some vehicles use a solenoid to control vacuum or pressure to the wastegate actuator, while others use electronically controlled turbocharger actuators. Always verify the OEM wiring diagram and specifications for the specific vehicle.
Common Causes of P0247
- Faulty Turbocharger Wastegate Solenoid B.
- Short to ground in the solenoid control circuit.
- Open or damaged wiring.
- High resistance in the control circuit.
- Low voltage supply to the solenoid.
- Corroded or loose electrical terminals.
- Damaged solenoid connector.
- Blown fuse or power-supply fault, where applicable.
- Heat-damaged wiring near the turbocharger or exhaust.
- Damaged vacuum or boost-control hose.
- Sticking wastegate actuator or linkage.
- Turbocharger control-system problem.
- ECM/PCM control-driver fault.
Symptoms of P0247
- Check Engine Light.
- Reduced engine power.
- Poor acceleration.
- Reduced or inconsistent turbocharger boost.
- Slow throttle response.
- Limp or reduced-power mode.
- Unstable boost pressure.
- Reduced fuel economy.
- Additional turbocharger or boost-control codes.
Is P0247 Serious?
P0247 should be diagnosed promptly.
The severity depends on the actual cause. A defective solenoid or damaged wire may primarily affect turbocharger performance, but an improperly controlled wastegate can also produce abnormal boost conditions and drivability problems.
If the vehicle develops severe power loss, excessive smoke, unusual turbocharger noise, overheating, or signs of uncontrolled boost, avoid continued driving until the cause is identified.
Can I Drive With P0247?
Limited driving may be possible if the vehicle runs normally and no severe symptoms are present. However, avoid heavy acceleration and high engine loads until the turbocharger control system has been inspected.
Turbocharger Wastegate Solenoid B Location
The location of Wastegate Solenoid B varies by vehicle.
It may be mounted close to the turbocharger, on the engine, on a bracket in the engine compartment, or integrated into another turbocharger control assembly.
On some systems, the solenoid is connected to vacuum or pressure hoses leading to the wastegate actuator.
Component Responsible for P0247
The component most directly associated with P0247 is Turbocharger Wastegate Solenoid B and its electrical control circuit.
However, the solenoid itself is not automatically the failed component. The ECM/PCM monitors the electrical circuit, so wiring, connectors, power supply, grounding, or the ECM/PCM driver can also cause P0247.
How to Fix P0247
1. Confirm the DTC
Scan the vehicle and confirm P0247. Record all stored, pending, and manufacturer-specific codes before clearing anything.
2. Inspect the Solenoid
Inspect Wastegate Solenoid B for physical damage, contamination, overheating, corrosion, and damaged hose connections.
3. Inspect the Connector
Check the electrical connector for corrosion, water intrusion, bent pins, loose terminals, and damaged locking mechanisms.
4. Inspect the Wiring
Follow the harness from the solenoid toward the ECM/PCM. Look for broken wires, chafing, melted insulation, previous repairs, and contact with hot turbocharger or exhaust components.
5. Verify the Power Supply
Check the solenoid power supply according to the vehicle's wiring diagram and operating conditions.
Do not assume that every vehicle supplies constant battery voltage to the solenoid.
6. Test the Control Circuit
Because P0247 indicates a low electrical condition, check the control circuit for a short to ground, excessive resistance, open circuit, or poor connection.
7. Test the Solenoid
Measure the solenoid resistance and perform an activation test when permitted by the manufacturer's procedure.
Use the OEM specification for the exact solenoid rather than a universal resistance value.
8. Inspect the Wastegate System
Check vacuum or boost-control hoses, the actuator, linkage, and wastegate mechanism for leaks, restrictions, sticking, or mechanical damage.
9. Verify ECM/PCM Control
If the solenoid, wiring, connector, power supply, and wastegate mechanism pass inspection, test the ECM/PCM control circuit according to the OEM diagnostic procedure.
P0247 Diagnostic Signal Flow
↓
Wastegate Solenoid B
↓
Control Circuit
↓
ECM/PCM
↓
Wastegate Actuator
↓
Wastegate Mechanism
↓
Turbocharger Boost Control
The exact electrical arrangement varies between vehicles. Some systems use an ECM-controlled ground side, while others use different electronic control strategies.
P0247 Electrical Diagnosis
A low-circuit DTC should be approached as an electrical fault first, while still verifying the mechanical wastegate system when required.
1. Confirm P0247.
2. Check related DTCs and freeze-frame data.
3. Identify Wastegate Solenoid B and its circuit.
4. Inspect the connector and wiring.
5. Verify power supply.
6. Check the control circuit for short-to-ground conditions.
7. Check continuity and resistance.
8. Test the solenoid.
9. Verify ECM/PCM control.
10. Inspect actuator and wastegate operation.
P0247 OBD Live Data
Depending on the vehicle and scan tool, useful parameters may include:
- Commanded boost pressure.
- Actual boost pressure.
- Wastegate command.
- Wastegate position, if supported.
- MAP sensor pressure.
- Engine RPM.
- Engine load.
- Throttle position.
- Intake air temperature.
Live Data can help determine whether the electrical fault is affecting actual turbocharger operation.
Multimeter Testing for P0247
A digital multimeter can help identify the electrical cause.
- Identify the correct solenoid terminals from the wiring diagram.
- Verify the specified power supply.
- Check the control circuit.
- Test circuit continuity.
- Check for a short to ground.
- Check for excessive resistance.
- Inspect connector terminal tension.
- Measure solenoid resistance when specified.
- Perform voltage-drop testing where appropriate.
The correct voltage and resistance values depend on the vehicle. Generic measurements should not be used as a replacement for OEM specifications.
Wastegate and Boost-System Inspection
If the electrical circuit passes its tests, inspect the mechanical side of the turbocharger control system.
- Check vacuum hoses for cracks and disconnections.
- Check boost-control hoses for leaks.
- Inspect the wastegate actuator.
- Check linkage movement.
- Look for binding or sticking.
- Verify that the wastegate responds correctly to the specified control input.
A mechanical wastegate problem can affect turbocharger operation even when the solenoid electrical circuit is functioning correctly.
Common Repair Mistakes
Replacing the Turbocharger First
P0247 is primarily associated with the wastegate solenoid B electrical circuit. The turbocharger should not automatically be replaced.
Replacing the Solenoid Without Testing the Wiring
A short to ground, damaged wire, poor connector, or power-supply problem can produce the same code.
Ignoring Heat-Damaged Wiring
Turbocharger wiring is exposed to high temperatures. Inspect the harness carefully for melted insulation and damaged conductors.
Confusing Circuit Low With Low Boost
Low in P0247 describes an electrical circuit condition. It does not automatically mean that the engine has low turbocharger boost.
Using a Universal Resistance Value
Wastegate solenoid resistance varies between applications. Always use the specification for the exact vehicle.
Replacing the ECM/PCM Too Early
The ECM/PCM should only be considered after the solenoid, wiring, connector, power supply, and control circuit have been properly tested.
P0247 Repair Cost
Approximately $50–$150+.
Approximately $50–$250+.
Approximately $100–$400+.
Can range from several hundred dollars to substantially more depending on the vehicle.
These are general estimates only. Actual costs vary according to vehicle make, model, engine, parts prices, labor rates, accessibility, and the confirmed cause of P0247.
OEM Diagnostic Considerations
OEM service information is particularly important for P0247 because the configuration of Wastegate Solenoid B can vary significantly between manufacturers.
The OEM procedure may specify the exact connector terminals, power supply, control strategy, resistance, activation test, expected voltage, actuator behavior, and ECM/PCM monitoring conditions.
Always use the correct wiring diagram for the exact engine and model year.
Frequently Asked Questions
What does P0247 mean?
P0247 means Turbocharger Wastegate Solenoid B Low. The ECM/PCM has detected an abnormally low electrical condition in the associated control circuit.
Does P0247 mean the turbocharger is bad?
No. The problem may be caused by the solenoid, wiring, connector, power supply, control circuit, actuator, or another part of the wastegate system.
Can a short to ground cause P0247?
Yes. A short to ground in the solenoid control circuit can create the low electrical condition monitored by the ECM/PCM.
Can a bad connector cause P0247?
Yes. Corrosion, loose terminals, water intrusion, or poor terminal contact can interfere with the solenoid circuit.
Can P0247 cause low boost?
It can. If the wastegate cannot be controlled correctly, turbocharger boost may not reach the expected level. However, the word "Low" in the DTC refers to the electrical circuit, not directly to boost pressure.
Can P0247 cause limp mode?
Yes. Some vehicles may reduce engine power when a turbocharger control fault is detected.
How do I fix P0247?
Confirm the code, inspect the solenoid and connector, test the power and control circuits, inspect the wiring, test the solenoid, and verify the wastegate actuator and mechanism before replacing major components.
Where is Wastegate Solenoid B?
Its location depends on the vehicle. It may be near the turbocharger, engine, or integrated into a turbocharger control assembly.
Can I drive with P0247?
Limited driving may be possible if the vehicle operates normally, but heavy acceleration and high-load driving should be avoided until the fault is diagnosed.
Related Codes
- P0243 – Turbocharger Wastegate Solenoid A Circuit.
- P0244 – Turbocharger Wastegate Solenoid A Range/Performance.
- P0245 – Turbocharger Wastegate Solenoid A Circuit Low.
- P0246 – Turbocharger Wastegate Solenoid B Circuit High.
- P0248 – Turbocharger Wastegate Solenoid B Circuit High.
These are separate DTCs related to turbocharger wastegate control. They are not alternative definitions of P0247, and the exact component and circuit should always be verified for the vehicle being diagnosed.
Final Takeaway
P0247 indicates a low electrical condition in the Turbocharger Wastegate Solenoid B control circuit.
The correct diagnostic approach is to test the complete electrical circuit before replacing the solenoid or turbocharger. Inspect the wiring, connector, power supply, control circuit and solenoid, then verify the actuator and wastegate mechanism when necessary.
Because turbocharger control systems differ between vehicles, use the correct OEM wiring diagram, electrical specifications, and diagnostic procedure for the exact make, model, engine, and model year.