Fault code P0047 – a step-by-step guide to diagnosing and fixing it

Error code P0047 is displayed and the check engine light is on - what does this mean?

The OBD system detects a fault in the turbocharger control valve control circuit, more precisely a signal value that is too low (Low). This DTC P0047 affects the wastegate solenoid or the turbocharger bypass valve and may have slightly different designations for different manufacturers.

What causes can this error code have?

• Defective turbocharger control valve (wastegate solenoid)
• Damaged wiring to the control valve
• Corroded or loose plug connections
• Defective vacuum hoses to the turbocharger
• Faulty engine control unit software
• Mechanical defect in the wastegate mechanism
• Short circuit in the valve control line
• Defective boost pressure sensor

What symptoms occur in parallel with fault code P0047?

• Loss of power: Significantly reduced engine power, especially when accelerating
• Irregular idling: Engine runs unevenly or stutters at idle speed
• Black smoke: Dark exhaust fumes from the exhaust, especially under load
• Starting problems: Delayed starting or difficulty starting the engine
• Whistling noises: Unusual noises from the turbocharger area
• Overheating: Increased engine temperature due to faulty boost pressure control

How can the problem with error code P0047 be rectified?

• The repair requires a systematic approach, as several components may be affected.
• Replace the turbocharger control valve: Replace the defective wastegate solenoid with a new original part and then delete the fault memory
• Repair wiring: Locate damaged cables to the control valve, repair severed areas or replace the complete cable set
• Clean plug connections: Disconnect all electrical connections on the turbocharger system, clean with contact spray and reconnect firmly
• Replace vacuum hoses: Identify porous or damaged vacuum hoses to the turbocharger and replace with new, heat-resistant hoses
• Engine control unit update: Have the software update carried out by the authorized dealer if there are known problems with the current version
• Repair wastegate mechanism: In the event of mechanical defects, replace the complete wastegate actuator on the turbocharger or have it overhauled