P0045 OBD Error Code: Problem & Solutions

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If you are struggling with issues like reduced power form the engine, increased fuel consumption, irregular throttle response and Check Engine Light on, it might be due the OBD Error Code P0045.

This code represents the problem with the turbocharger or the supercharger which is detected by the ECU (Engine Control Unit) due to problems with the circuit or solenoid resulting in reduced air pressure harming the fuel delivery system and thus the engine performance. This is indicated by flashing of Check Engine Light on the dashboard and sudden stalling of car engine.

What causes the problem of Turbo/Super Charger Boost Control Solenoid Circuit/Open?

• Intake manifold vacuum leaks
• Air Cleaner is dirty
• Stuck open or close wastegate
• Faulty intercooler
• Exhaust manifold and turbocharger having loose connections
• Turbocharger and the intake pipe having loose connections
• Failed boost sensor
• Boost sensor circuit open or short
• Electrical connectors in the boost sensor circuit are corroded, lose or open
• Internal oil leaks and oil supply problems causing turbo failures

1. Turbocharger - Faulty turbocharger won’t be able to force extra air into the combustion chamber. Replace your old turbochargers with us!
2. Supercharger - Damaged supercharger will not increase the air pressure or density of air supplied to an internal combustion engine, thus reducing engine power. Replace damaged supercharger and parts today!
3. Intercoolers - A damaged intercooler will not reduce the air temperature and thereby not increasing the density of the air supplied to the engine. Visit us to buy quality intercooler today!
4. Diagnostic Tools - You will need high grade diagnostic tools for correction of the OBD error code which is detected. Visit us today to grab amazing deals.
5. Engine Control Unit - On very rare occasion the ECU can also be faulty, interpreting the correct input ad faulty. If found faulty, replace it immediately.
6. Boost Control Solenoid - If the solenoid does not function properly, then the air pressure will decrease and hamper the performance of the engine. Replace it now!
7. Intake Manifold - Vacuum leaks can cause intake manifold to go bad and hampers the fuel to air ratio causing engine misfires and more. Replace faulty intake manifolds immediately.
8. Air Cleaner - Always check for dirty air cleaners and replace them immediately.
9. Exhaust Manifold - Faulty exhaust manifolds can cause decrease in engine power, acceleration and fuel efficiency. Replace it now!
10. Intake Pipe - Leakages in the intake systems can reduce the air pressure that will disturb the fuel to air ratios and thus the combustion process hampering the performance. Repair/replace them immediately.
11. Boost Control Sensor - This sensor checks for the pressure of air and informs the ECU, which further calculates the exact amount to be mixed with fuel for maximum output. Thus, wrong data can be bad and thus it need immediately change. Buy new sensors form us now!
12. Electrical Connectors - Always check for corroded, opened or shorted wiring and connectors while diagnosing this error and replace them immediately.

Common Symptoms

• Loss of acceleration
• Loss of engine boost and power
• Engine misfires
• Check Engine Light On

The most common repairs to address the P0045 code are as follows:

• With the help of a certified technician verify the code with an OBD-II scanner, reset the fault codes, and perform a road test.
• If the P0045 code returns, that means the OBD error is present.

Following is the test procedure:

• Check the turbo or supercharger system for loose connections and cracked/damaged hoses.
• Check the wirings for loose connections, damaged wiring or a faulty sensor.
• Check boost pressure range at various accelerations.
• Check the turbocharger for damaged blades, wobbly shaft rotation, worn bearings, oil leaks into the turbo boost side, and correct control valve or wastegate operation.

Having done all of the above, is the boost pressure in working fine, then usually the problem is always with the solenoid, or the pressure sensor. Sometimes the turbocharger can itself be physically damaged due to changing pressures and temperatures and may require change.

Use an OBD-II scanner to identify the code, then reset the code and test the vehicle to see if the code returns. If it returns, inspect for vacuum leaks, loose connections, wiring failures, or turbocharger faults. After that check for boost sensors and solenoids. If everything seems perfect, then check the ECU and thus replace the faulty parts and check again if the error returns or not.

Common mistakes when diagnosing the P0045 Code

Oftentimes the boost sensor and circuit are blamed, and replaced, neglecting the damaged wiring and connectors. Because there can be several causes for this code, a complete inspection should be carried out in order to avoid repairs that may be unnecessary.