What Does P0247 Mean?
The ECM has detected a malfunction in the turbocharger wastegate solenoid B control circuit. On vehicles with twin-turbo or sequential turbo setups, solenoid B controls the wastegate on the secondary turbocharger. The driver may notice poor high-RPM performance, boost control issues in the upper power band, or limp mode when the second turbo should be active.
Common Causes
35%
Failed wastegate solenoid B (open or shorted coil)
25%
Damaged or disconnected wiring to wastegate solenoid B
20%
Corroded or damaged connector at solenoid B (heat exposure near turbo)
10%
ECM driver circuit failure for solenoid B output
10%
Vacuum hose disconnection or leak at solenoid B
Diagnostic Steps
1
Locate wastegate solenoid B (typically near the secondary turbo or on the intake manifold near the rear bank) and inspect the connector for heat damage, corrosion, or disconnection.
2
Measure solenoid B coil resistance — typical range is 10-40 ohms. Compare to solenoid A as a reference. An open or shorted reading means the solenoid has failed.
3
Verify power supply and ECM ground control at the solenoid connector. With the key on, the supply pin should show battery voltage, and the ground pin should toggle when commanded by the ECM.
4
Inspect vacuum lines from solenoid B to the wastegate B actuator for cracks, disconnections, or heat deterioration. Lines near the exhaust are prone to failure.
5
Check the wastegate B actuator arm for free movement and proper spring return. If the secondary turbo wastegate is seized, the solenoid code may be secondary to the mechanical issue.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The ECM has detected a malfunction in the turbocharger wastegate solenoid B control circuit. On vehicles with twin-turbo or sequential turbo setups, solenoid B controls the wastegate on the secondary turbocharger. The driver may notice poor high-RPM performance, boost control issues in the upper pow...
The most common cause of P0247 (Turbocharger Wastegate Solenoid B Malfunction) is: Failed wastegate solenoid B (open or shorted coil)
Typical repair costs for P0247 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The secondary turbocharger boost cannot be properly controlled. This is primarily a performance concern at higher RPMs and loads. Driving at moderate speeds with light throttle is generally safe, but overboost from the secondary turbo is possible under hard acceleration. Avoid full-throttle driving until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0247 to identify the root cause.
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Quick Info
Category
Powertrain
System
Turbocharger / Supercharger System
Difficulty
Type
Generic (SAE)
Recommended Tools
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