Answer
Sep 29, 2024 - 12:47 AM
The "Engine Fault Service Now" warning on a 2017 Ford Focus indicates that the vehicle’s onboard diagnostic system has detected an issue with the engine or a related system. Here are some common reasons for this message:
- Low Battery or Faulty Alternator: A weak or failing battery, or an alternator that's not charging properly, can cause this message to appear.
- Ignition Coil Failure: Faulty ignition coils can lead to engine misfires and trigger this warning.
- Fuel System Issues: Problems with fuel injectors, fuel filters, or the fuel pump can cause a lack of fuel delivery, affecting engine performance.
- Sensor Malfunction: Sensors such as the mass airflow sensor, oxygen sensor, or crankshaft position sensor may fail or malfunction, causing the engine control unit (ECU) to issue a fault warning.
- Throttle Body Problems: Carbon buildup or other issues in the throttle body can result in poor air intake, leading to the engine fault message.
To accurately diagnose the issue, it's recommended to use an OBD2 scanner to retrieve the fault codes from the car's computer. If you're unfamiliar with this process, seeking help from a mechanic is advisable. Prompt attention to this warning is important to prevent further damage to the engine.
