Ford Fiesta ‘Engine Malfunction Service Now’ Warning: Meaning, Causes And How To Fix

Описание: Ford Fiesta ‘Engine Malfunction Service Now’ Warning: Meaning, Causes And How To Fix. In this video I will talk about Ford Fiesta "Engine Malfunction Service Now" warning.

Here’s what it means:
An illuminated Engine Malfunction Service Now message means that there is a problem with your Ford Fiesta’s engine that needs immediate resolution. The warning message serves a critical role in informing drivers of possible engine problems that are likely to affect the car’s performance and compromise safety and efficiency.

Here’s what causes it and how to fix the issue:

Faulty Oxygen Sensor
A faulty oxygen sensor may contribute to engine issues that could trigger the Engine Malfunction Service Now message. Oxygen sensors assess the air-fuel ratio as fuel enters the engine. When defective, they fail to monitor the ratio increasing the likelihood of an out-of-sync ratio. When an improper air-fuel ratio enters the engine, it can result in issues with the control system, hence the warning message.

If you suspect that a faulty oxygen sensor triggered the message, use your OBD2 scanner to confirm your suspicions. Plug the scan into the car’s OBD2 port and use the instructions provided to read the error codes. Next, use a reliable internet source (e.g., manufacturer websites or trusted automotive forums) to know the meaning of the error codes. Alternatively, have an expert mechanic assist you in interpreting the codes. If the problem is with the oxygen sensor, the mechanic will replace it. Ensure that the new sensor meets OEM specifications and matches your car. The replacement cost typically ranges from $275 to $500, but it is advisable to check with local repair shops for precise quotes.


Defective Fuel Cap
A missing or defective fuel cap is also likely to trigger the Engine Malfunction Service Now warning message in your Ford Fiesta as a result of inadequate air pressure going to the emissions system. Several factors can cause this, including, damage to the fuel cap as a result of extreme temperatures, a fuel cap that has been installed incorrectly, or cracks on the fuel cap. In such a case, begin by inspecting the fuel cap for any indication of damage.

Alternatively, let an expert mechanic inspect the fuel cap, and if determined to be the cause of the warning message, replace the fuel cap. Replacement charges are about $112 and $117 depending on the location of the shop, model year of your Ford Fiesta, and labor cost.


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