P0045 - TURBO / SUPER CHARGER BOOST CONTROL SOLENOID CIRCUIT / OPEN

POST UPDATED IN April, 2021

Description of DTC code P0045 Generic

Turbochargers and superchargers are pumps that force the engine air to increase power. In the case of turbochargers they are driven by exhaust and superchargers are expelled from the crankshaft of the engine through a belt.

Many vehicles use variable geometry turbochargers. This turbo model has blades that are adjustable. They are located outside the turbine, which can be opened or closed to vary the amount of boost pressure. In this way, the turbo can be controlled by the engine speed in an independent manner. The position of the pallets is controlled by the Powertrain Control Module (PCM) through an electronic control solenoid. The position of the pallets is determined by a position sensor.

On the other hand, vehicles that use a fixed displacement turbocharger, the impulse is controlled by a discharge valve. This valve proceeds to open to relieve the reinforcing pressure. The PCM monitors this system by means of a booster pressure sensor.

Regardless of the type of turbocharger used by the vehicle, DTC code P0045 OBDII is configured when the PCM encounters an opening in the booster control solenoid circuit.

Symptoms of fault code P0045 Generic

  • Illuminated Check Engine
  • Engine performance decreases.
  • Engine temperatures rise.
  • Excessive amount of black smoke exits the exhaust.
  • Poor acceleration.

Causes of OBD2 P0045 Generic

The reasons that lead to the establishment of the diagnostic code P0045 OBD2 are:

  • Cables or connectors corroded, burned or disconnected.
  • Damaged turbo boost control solenoid.
  • Supercharging pressure sensor defective.
  • Turbocharger may be defective.

Possible solutions of the DTC code P0045 Generic

To solve the problems caused by the fault code P0045 OBDII do the following:

  • Consult Technical Service Bulletins (TSB).
  • Inspect the tube control system. If you find loose connections or damaged cables, you should make the necessary repairs.
  • Obtain specifications for the control solenoid. Then, unplug the electrical connector and use a digital volt-ohm meter (DVOM) to check the solenoid resistance levels. If there is a match between the actual resistance and the specification, apply battery voltage and ground to the solenoid. You should hear a sound like a click. If so, the solenoid is fine. Otherwise, replace the solenoid.
  • Tests the voltage of the booster control solenoid at the time it is indicated. Compare with the manufacturer's specifications. If the result does not match the actual voltage, perform necessary repairs. Also, check the continuity in each circuit, if there are problems, repair them.

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