P0247
UniversalThe Powertrain Control Module (PCM) has detected a malfunction in the control circuit for the turbocharger wastegate solenoid "B".
Medium SeverityThis code indicates that the engine computer has detected an electrical or performance issue with the turbocharger wastegate solenoid "B". This malfunction typically results in incorrect boost pressure control, leading to reduced engine power and efficiency.
⚠️ Before You Begin (Safety First)
Always allow the engine to cool down before working on any turbocharger components to prevent severe burns. Disconnect the battery before performing any electrical repairs to avoid electrical shock or damage to the vehicle's systems.
Common Symptoms
- Check Engine Light illumination
- Reduced engine power (limp mode)
- Lack of turbocharger boost
- Engine hesitations during acceleration
- Possible whistling or hissing noises from the turbo area
Common Causes
- Faulty turbocharger wastegate solenoid "B"
- Wiring harness open or shorted to ground/power
- Poor electrical connection at the solenoid
- Vacuum leaks in the wastegate control system (if vacuum operated)
- Stuck or damaged wastegate actuator
- Rarely, a faulty Powertrain Control Module (PCM)
Frequently reported on: Ford F-150 (2011-2016), Subaru WRX/STI (2008-2014), Volkswagen Golf/Jetta TDI (2009-2014), BMW 335i (2007-2010), Hyundai Sonata (2011-2014)
Diagnostic Steps
- Inspect all vacuum lines and electrical connectors associated with the wastegate solenoid for damage, cracks, or loose connections.
- Check the resistance of the wastegate solenoid using a multimeter; compare to manufacturer specifications.
- Apply vacuum or voltage directly to the solenoid (if applicable and safe to do so) to check for proper operation (opening/closing).
- If the solenoid is found to be faulty, replace it with a new, OEM-specified part.
- Clear the DTCs and test drive the vehicle to ensure the repair is successful.
👨🔧 When to Call a Professional
If after basic diagnostics (checking wiring and vacuum lines), the problem persists, or if you suspect the turbocharger wastegate actuator itself is stuck or damaged, it's best to consult a professional mechanic. Turbocharger systems can be complex and require specialized tools for proper diagnosis and repair.
Commonly Asked Questions
What is a wastegate solenoid?
It's an electronically controlled valve that regulates the exhaust gas flow to the turbocharger turbine, thereby controlling boost pressure.
Can I drive with a P0247 code?
While the car may still be drivable, it's not recommended for extended periods due to reduced power, potential fuel economy issues, and possible engine strain.
Is the wastegate solenoid the same as the turbocharger actuator?
No, the solenoid controls the vacuum or pressure to the actuator, which then physically moves the wastegate valve. They work together.
How much does it cost to replace a wastegate solenoid?
The cost of the part can range from $50 to $200, plus labor if a professional does it.
Could a P0247 code be caused by a bad turbocharger?
While unlikely to be the primary cause, a malfunctioning turbocharger could indirectly affect the wastegate's operation or the solenoid's commanded values. Always diagnose the solenoid first.