Supercharged boost control solenoid - 1995 Buick Riviera

Error Code: P0047
Description:
Turbocharger (TC) Boost Control Solenoid/Supercharger (SC) Boost Control Solenoid - Circuit Low
Causes:
- Wiring short to earth.
- Turbocharger (TC) boost control solenoid/Supercharger (SC) boost control solenoid.

Found this for boost control solenoid. I'd have to do proper diagnostics. I don't know if I answered your question or not?

code p 0045 refers to turbo/supercharger boost control solenoid---circuit open===causes ---wiring---boost control solenoid

p0040 is Oxygen sensor signals swapped Bank 1 sensor 1/Bank 2 sensor 1.
p0045 is Turbo/ Supercharger Boost control solenoid circuit open.
p0500 is vehicle speed sensor A.

Turbocharger (TC)/supercharger (SC) boost pressure
control B - electrical malfunction
probable cause of it might be
Wiring, TC/SC boost control solenoid
but it could differ from auto maker

P0029 - Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2
Causes:
- Dirty engine oil
- Low engine oil level
- Exhaust valve control solenoid circuit open or shorted
- Exhaust valve control solenoid circuit poor electrical connection
- Faulty exhaust valve control solenoid

Solutions:
- Change oil
- Replace exhaust valve control solenoid

P0047 - Turbocharger/Supercharger Boost Control A Circuit Low
This vehicle is not equipped with a turbocharger or supercharger if it is a 1994.

P0137 - o2 Sensor Circuit Low Voltage Bank 1 Sensor 2
Causes:
- Sensor circuit harness or connectors is open or shorted
- Rear heated oxygen sensor Bank 1 may be faulty
- Fuel pressure may be faulty
- Fuel injector may be faulty
- Intake air leaks

Solution:
Replacing the O2 Sensor 2 usually takes care of the problem.

P0107 - Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Causes:
- Damage harness or connectors
- MAP sensor circuit is open or shorted
- MAP sensor
- Damaged PCM or ECM

Solutions:
- If damage, repair MAP sensor harness or connector
- Replace MAP sensor
- Replace PCM or ECM

SCAN VECHICLE FOR ANY SUPERCHARGER BOOST SOLENOID FAULT CODES.AND CHECK FOR LOOSE OR BROKEN VACUUM LINES GOING TO SUPERCHARGER BOOST SOLENOID THAT WILL CAUSE NO BOOST PROBLEMS.

Fig. 1: Supercharger assembly and related parts

REMOVAL & INSTALLATION

1. Disconnect the negative battery cable.
2. Remove the accessory drive belt from the supercharger pulley.
3. Relieve the fuel pressure and remove the fuel injector sight shield.
4. Disconnect the fuel pipes from the fuel rail and vacuum hose at the pressure regulator.
5. Disconnect the electrical connectors from the fuel injectors and remove the fuel rail mounting bolts. Remove the fuel rail with the injectors intact.
6. Disconnect the electrical connectors at the IAC, TPS, MAF, EGR and boost control solenoid. Lay the wiring harness aside.
7. Remove the air intake duct and remove the EGR pipe from the supercharger.
8. Disconnect the throttle cable and the cruise control cable. Remove the cable bracket.
9. Remove the tensioner bracket to supercharger mounting stud.
10. Remove the supercharger to intake manifold bolts, remove the supercharger from the intake manifold. Remove the supercharger gasket and coolant passage O-rings. To install:
    
11. Replace the oil passage O-rings and the supercharger gasket.
12. Install the supercharger and bolts. Install the tensioner bracket-to-supercharger bolt. Tighten the bolts to 19 ft. lbs. (26 Nm).
13. Install the cable bracket and connect the throttle and cruise control cables.
14. Connect the EGR pipe to the supercharger and install the air intake duct.
15. Connect the electrical connectors to the IAC, TPS, MAF, EGR and boost control solenoid.
16. Install the fuel rail and bolts and tighten the bolts to 15 ft. lbs. (24 Nm).
17. Connect the connectors to the fuel injectors and the vacuum hoses at the pressure regulator.
18. Connect the fuel pipes to the fuel rail and install the fuel injector sight shield.
19. Install the accessory drive belt to the supercharger and connect the negative battery cable.

Verify that the supercharger belt is tight enough...check the tensioner and idler pullies.

Then check your vacuum lines on the boost solenoid.

Check the vaccuum lines to the super charger boost control valve located on the back of the supercharger closest to the air cleaner opposite the pully. If you are not getting vaccuum to the boost control colenoide follow the vaccuum hoses back to the boost control switch and check for engine vaccuum at the switch.