Small-displacement gasoline engines for Ford vehicles, namely the Ecoboost 1.0L and 1.5L, are equipped with turbocharging technology. These engines are known for their fuel efficiency and reliability, but issues with the turbocharger can sometimes arise. In this particular case, a Ford Focus 2017 with an Ecoboost 1.0L engine has generated error code P0299.
What does error P0299 mean?
Error P0299 is a trouble code that indicates a problem with the supercharging system in Ecoboost engines used in Ford and other vehicle brands. This error typically occurs when the boost system is not working properly and is not providing the required level of boost.
The main causes of the P0299 error may include:
Damaged air pressure sensors or air temperature sensors; Defective boost valves or sensors that control them; Damaged turbocharger or its components, such as the turbine or bushings; Electrical problems, such as low battery voltage or damaged electrical wiring.
The 1.0- and 1.5-liter Ecoboost engines found on select Ford models have boost pressures ranging from 8.7 to 21 psi (0.6 to 1.45 bar), depending on engine mode and power output. Because these engines are small and designed for fuel efficiency, their boost pressures are lower than those of the more powerful Ecoboost engines.
Symptoms of reduced boost pressure in Ford Ecoboost 1.0L and 1.5L engines
Since the P0299 error on the Ecoboost 1.0, 1.5L Ford Focus 2017 engines is associated with a decrease in turbocharging pressure, the symptoms of this error may be as follows:
- Increased fuel efficiency. When the boost pressure is reduced, the engine will require more fuel to provide the required power. This can lead to increased fuel efficiency.
- Engine Power Limitation. When boost pressure drops, the engine's power output may be reduced, leading to a decrease in vehicle traction and acceleration..
- Poor Acceleration. Inadequate boost pressure can result in poor acceleration, particularly from a standstill, during acceleration, passing, and other driving scenarios. This is due to the engine's inability to produce sufficient power without adequate boost pressure, resulting in a noticeable reduction in acceleration and overall driving performance.
- Risk of Turbocharger Damage. A decrease in boost pressure can increase the risk of damage to the turbocharger, which may require replacement. When the engine is running with insufficient boost pressure, the turbocharger may operate at excessively high temperatures and pressures, which can cause damage to its internal components.
The most common cause of the P0299 error on Ecoboost 1.0, 1.5L Ford Focus 2017 engines
As we can see, the consequences of the P0299 error code can be quite significant. However, the cause of the malfunction is usually very simple – it's just a vacuum pump valve.
It is located on the vacuum pump housing and can be replaced within a few minutes.
How to check and replace the Ford Focus vacuum pump valve
However, with simple equipment, the valve can be checked to ensure its malfunction. To do this, it is necessary to remove the vacuum gauge readings by connecting it to the tube that goes from the valve. It is indicated by an arrow in the photo.
If the vacuum gauge pointer is in the zero zone, as shown in the photo, then the valve is definitely faulty.
The normal value is about 15 psi.
In almost all cases of a faulty vacuum pump valve, the culprit is the valve diaphragm. Over time, it can wear out, shift from its seat, or tear.
There are repair kits available for the valve that can be purchased to save money and not spend extra on the valve assembly. Its catalog numbers are: CM5G-2A451-GA, 1867424, 1765939.
The valve has a simple design - a body with a seat, seal, and connector, the membrane itself, and a cover.
The valve assembly is fixed to the vacuum pump body using a Torx 25 screw.
Depending on what you choose, replacing the membrane or the valve assembly will take up to 15 minutes. After installing the valve back in place, it is important to make sure it is working properly.
Using a vacuum gauge, measure the vacuum pressure, the arrow should show at least 14-18 psi.