What causes fault code P0247?

• Most likely: Faulty wastegate solenoid B (internal short or open circuit) • Likely: Damaged wiring harness or corroded connectors affecting solenoid B • Possible: Vacuum line issues or leaks (if the solenoid operates a vacuum actuator) • Rare: Internal Engine Control Module (ECM/PCM) failure

How do you fix fault code P0247?

STEP 1: Visually inspect solenoid B wiring and connectors for signs of chafing, heat damage, or corrosion. STEP 2: Perform a resistance test on the solenoid. Disconnect the connector and measure between the terminals; typical values are 10-25 Ohms. Infinite resistance indicates an open circuit. STEP 3: Check for power supply (usually 12V) and verify the ground trigger from the ECU using an oscilloscope or multimeter (Duty-cycle/PWM) while commanding the valve 'ON' with a scan tool. STEP 4: Inspect related vacuum lines for leaks or blockages. Replace solenoid B if internal electrical failure is confirmed.

Powertrain (Engine & Gearbox)Standard EOBD

P0247 - Turbocharger Wastegate Solenoid B Malfunction

Q: What are the symptoms of fault code P0247?

• Check Engine Light (MIL) illuminated • Reduced engine power (Limp mode) • Inconsistent or loss of boost pressure • Overboost or underboost conditions noticeable during acceleration • Increased fuel consumption

Last updated:1 February 2026

Related:Wastegate, Turbocharger, Engine Control Module (ECM), Boost Pressure Sensor

System

Powertrain (Engine & Gearbox)

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Technical Description

Diagnostic Trouble Code (DTC) P0247 is triggered when the Engine Control Module (ECM) detects an electrical problem in the Turbocharger Wastegate Solenoid 'B' circuit. This solenoid manages the position of the wastegate to control boost pressure by bypassing exhaust gases. The ECM monitors duty cycle and circuit voltage; if it detects an open circuit, a short to ground, or a short to voltage that falls outside factory specifications, P0247 is stored. This typically refers to the secondary turbocharger in twin-turbo configurations.

Possible Causes

Faulty wastegate solenoid B (internal short or open circuit)

Damaged wiring harness or corroded connectors affecting solenoid B

Vacuum line issues or leaks (if the solenoid operates a vacuum actuator)

Internal Engine Control Module (ECM/PCM) failure

Symptoms

Check Engine Light (MIL) illuminated

Reduced engine power (Limp mode)

Inconsistent or loss of boost pressure

Overboost or underboost conditions noticeable during acceleration

Increased fuel consumption

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P0247 - Turbocharger Wastegate Solenoid B Malfunction

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P0247 - Turbocharger Wastegate Solenoid B Malfunction

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