Error code
OBD2 P0047
OBD2P0047
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Turbo/Super Charger Boost Control Solenoid Circuit Low.
Severity
moderateCan be driven but performance issues may occur.
Summary
P0047 indicates that there is a low voltage signal in the turbocharger or supercharger boost control solenoid circuit, which can affect engine performance and boost pressure regulation.
Symptoms
- Lack of engine performance
- Abnormal hissing noises from underhood area
- Increased engine and/or transmission temperatures
- Unusual amounts of black smoke from the exhaust
- Fouled spark plugs
- Hotter engine temperatures causing cylinder detonation
- Reduced engine acceleration
Common Causes
- Faulty boost pressure sensor
- Defective turbocharger/supercharger boost control solenoid
- Shorted or open wiring in the boost control solenoid circuit
- Loose, corroded, burnt, or disconnected electrical wiring/connectors in the boost sensor 5-volt reference circuit
- Turbocharger failure
Diagnosis
- Inspect all related wiring, connectors, components, and vacuum hoses.
- Check battery cable and post condition; rectify loose or corroded connections.
- Clear codes from the system to check for intermittent failures.
- Use a digital volt/ohmmeter (DVOM) to test solenoid resistance levels.
- Apply battery voltage and ground signal to the solenoid to listen for an audible 'tick'.
- Test circuit voltage and continuity at the boost control solenoid.
Fixes
- Replace faulty components such as the boost pressure sensor or turbocharger/supercharger boost control solenoid.
FAQ
What should I do if my car has P0047?
Inspect and repair any damaged wiring, connectors, or components. Test the boost control solenoid resistance and continuity to ensure proper function.
Is it safe to drive with P0047?
It is drivable but performance issues may occur due to reduced engine power and increased temperatures.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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