Ignition Switched On BMW: Issues, Causes, And How To Fix?

Have you encountered an ignition switched-on issue in your BMW car, and are you looking for a way to fix it as soon as possible?

Various causes can trigger this error, ranging from simple to complex issues. You will experience symptoms like when you try to start the car by turning the ignition key or pressing the start button, the engine does not get started, and the ignition switch shows unusual sounds or signs of wear and tear.

I will assist you in fixing the problem of ignition switched on BMW. After understanding the causes and symptoms of the flawed ignition switch and potential solutions to resolve the issues, you can save time and money. So, let’s start the process and bring your BMW to optimal performance.

What makes the ignition switch faulty?

The ignition switch plays a crucial role in starting the engine. It connects the voltage provider circuit with the starter motor, which causes the engine to start.

When a correctly working ignition switch becomes faulty, it may be due to electrical problems, physical damage, corrosion, battery issues, starter motor issues, etc. We will look at these causes and understand the right solution to solve the error.

Common Causes of “Ignition Switched On BMW” Warning

Here’s the breakdown of the common causes that can contribute to a bad ignition switch. 

• Faulty ignition switch
• Battery issues
• Starter motor problems
• Electrical issues
• Faulty ECU 

Faulty Ignition Switch

Cause

Physical damage or wear and tear can make the ignition switch faulty, indicating an “ignition switched on BMW” warning. Additionally, corrosion on the switch’s internal components and forceful key rotation can damage the switch.

Symptoms

You can identify the defective ignition switch with the help of these symptoms.

• The engine won’t start, and the key won’t turn.
• The car stalls and the starter does not make a sound.
• The dashboard lights flicker, and the accessories don’t power on.
• The steering wheel is stuck.

After successfully addressing these symptoms, the next step is to prompt them promptly.

Solutions

Inspect the switch for corroded or damaged components. Clean debris and corrosion from the ignition contacts and repair them if possible. The most reliable and long-lasting way to perform is to replace the malfunctioning switch and use a new quality.

For this replacement, you should visit a mechanic shop because it requires advanced tools and mechanic knowledge.

Battery Issues

Cause 

A battery supplies power to electric components, and when it becomes weak, damaged, or old, random power cuts can occur, which can cause improper power distribution from the ignition switch.

Symptoms

A battery’s symptoms include dimming headlights, flickering vehicle interior lights, difficulty starting the car, and some electric components that will not function properly, like the radio, GPU, accessories, and weak charging.

Solutions

Inspect the battery condition and ensure it is not too old and functioning correctly. Also, check the battery voltage and ensure it’s not below 12.6 volts. If the voltage is below 12.6 and the battery shows signs of wear, you must change it and install a new one. 

Starter Motor Issues

Cause

When the starter motor fails to start and does not engage with the flywheel, the engine does not start. It may be due to a fault in the motor or worn-out component.

Symptoms

• The engine won’t start when you turn the key, and it smells or smokes when you try to start it.
• You will feel clicking or grinding noises while pressing the start button.

Solutions

Inspect the starter motor from a certified technician who has expertise in fixing starter motor problems. The mechanic will visually inspect it and repair the fault that is causing the indication of the ignition switch on in the BMW car.

Electrical Issues

Cause

The ignition system is connected to various electric components, including fuses, wiring, connectors, etc. When these components become faulty, an “ignition switched on” warning light can appear on the BMW display.

Symptoms

Malfunctioning electronics, blown fuses, warning lights, damaged wires, and loose connectors are the most common symptoms of electric issues.

Solution

You must check the electric parts individually and carefully look for any signs of damage. After detecting the faulty component, replace that part and use a new one to fix the issue.

Additionally, you can get a quick view of these causes in the video below.

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How do we fix the Ignition switched On BMW Warning?

Here is the step-by-step process to fix the ignition switched-on warning in BMW.

• Inspect the battery performance and measure the voltage with a multimeter. The voltage should be between 12 to 13.
• Connect an error code scanning tool, such as an OBD-II scanner, to identify the ECU’s faulty codes, which will help you find faulty parts.
• Replace the essential fob battery. If issues persist, reprogram or replace the key fob.

After conducting all the inspections, replacements, repairs, and completions, you must turn off the engine for a few minutes. Then start the engine and see that the warning disappears from the display, which means your BMW ignition switch error is fixed.

The “Ignition switched on” warning on BMW’s dashboard indicates a critical problem with the ignition switch. However, it’s difficult to pinpoint the exact faulty part and fix the issue quickly. You must systematically check various components like the battery, ECU, electric components, and starter motor, and then, after diagnosing the problem, you can efficiently fix it.

However, it’s tough for a BMW driver to fix the error with a basic mechanical understanding. It’s a complex warning, and an expert technician can accurately resolve it. So, it’s best to seek professional help to keep your BMW performance optimal and maintain its proper functioning and efficiency.

FAQ – Frequently Asked Questions

How much does it cost to fix an ignition switch on a BMW?

It’s challenging to mention an accurate cost price because it can vary by location, service centre, and country. However, you can expect between $150 and $400 for service charges and parts.

Can I drive with the “ignition switched on BMW” warning light?

It’s a critical issue that can lead to severe damage if you drive a car with ignition problems. So, it’s advised first to fix the error from your nearest service shop and then drive confidently without fear.

How do I reset my BMW’s “ignition switched on” warning light?

Look at the BMW’s display after diagnosing the faulty parts and fixing the underlying issues. If the light turns off automatically, the problem is resolved successfully.