Question

What does service engine soon light mean​?

The service engine soon light implies that your car’s powertrain control module (PCM) has sensed a problem, and your car wants you to check on it.

The problem may not be a major one; however, it is an indication that your car engine may be experiencing a mechanical issue, sensor failure, or an emissions issue. The warning light will regularly show up if the PCM detects issues like misfires or oxygen sensor faults. To diagnose what the issue is, you must use an OBD-II scan tool. Find the issue and address it based on the error code.

What is the most common reason for the service engine soon light?

These are some common reasons for the light to illuminate.

• A defective oxygen sensor.
• Electrical problems like an issue with the battery or alternator.
• If your car is running short on fluids, like brake fluid, coolant, engine oil, or other fluids, the light will illuminate.
• A loose gas cap.
• Problems with ignition coils, spark plugs, and spark plug wires.
• Blockage or leakage in the air intake or fuel line.

Can I drive with the service engine soon light on?

You shouldn’t drive your car if the service engine soon light is blinking, as it implies a serious problem and driving further can cause severe engine damage. But you can drive with this light on if it’s a steady, yellow light. However, we recommend you take your car quickly to a mechanic to get the issue repaired so that it does not become a major one.

How to reset the service engine soon light

Follow these steps to reset the light.

• Before resetting the light, ensure the cause of the light has been repaired.
• Without starting the car engine, put the car key in the ignition and turn it to the ‘on’ position.
• Then, disconnect the negative terminal of the car’s battery for around 15 minutes.
• After 15 minutes, reconnect the car’s battery and turn on the ignition.
• Then, start the car’s engine. If the light has turned off, you’ve successfully reset it.

What’s the difference between Check Engine and Service Engine Soon?

A check engine light implies a severe, unexpected issue with the car’s engine or emissions system, which you must address quickly. However, the service engine soon light indicates some minor issues with the engine, which you must repair on time to avoid becoming a major issue.

What does the BMW service engine soon light indicate?

The light implies a fault sensed by the onboard diagnostic system, which can range from slight issues like a loose gas cap to more severe problems like a defective ignition coil or oxygen sensor.