What is limp mode
Imagine you're driving down the motorway when you notice a significant drop in your car’s power. The engine warning light illuminates on the dashboard, and your vehicle struggles to accelerate beyond a certain speed. This means your car has entered limp mode.
Limp mode is a protective feature designed to prevent further damage to your engine or transmission when a fault is detected. By limiting the vehicle's performance, it allows you to safely reach home or a service centre.
Read on to learn more about what triggers limp mode and how to address it.
What are the causes of limp mode?
Limp mode can be triggered by several issues with your vehicle. Understanding these causes will help you address the problem.
1. Issues with your engine
Engine problems, such as misfires or sensor failures, can cause limp mode. Look out for unusual noises, vibrations, or a decrease in performance. If your engine management light is illuminated, you need to immediately get your engine checked.
2. Coolant level
Low coolant levels can cause your engine to overheat, prompting the vehicle to enter limp mode to prevent major damage. To avoid this, regularly check your coolant levels and top up as needed.
3. Issues with your brakes
Problems with your brake system, such as a faulty brake light switch or multiple brake light bulb failure, can also trigger limp mode. Pay close attention to any warning lights related to your brakes and make sure you regularly do brake system maintenance, including checking the brake lights work properly.
4. Transmission mistakes
Transmission issues, including low transmission fluid or a malfunctioning clutch, can activate limp mode. If you find it difficult to shift gears or experience the gear slipping have your transmission inspected.
5. Problems with your wiring
Electrical issues, such as damaged wiring or poor connections, can interfere with the signals sent to your car's computer, leading to limp mode. Have your wiring system inspected by a professional for any visible damage or loose connections. Faulty earth points, corroded terminals, or broken wires can disrupt the communication between various sensors and the vehicle's ECU (engine control unit), causing it to default to limp mode.
6. Which sensors can cause limp mode?
Several sensors, including the oxygen sensor, throttle position sensor, and mass airflow sensor, play crucial roles in your vehicle's performance.
How to get out of limp mode
Navigating out of limp mode can be straightforward. Below is a step-by-step guide to help you bypass limp mode and restore your vehicle's performance.
Find somewhere safe to stop
Immediately pull over to a safe location away from traffic. Limp mode is designed to protect your vehicle, but driving in this mode for an extended period can cause further damage.
Turn off the engine
Turn off your vehicle's engine completely and remove the key. This can sometimes reset the system and clear any temporary issues.
Wait for a few minutes
Wait for about 5 to 10 minutes. This allows the vehicle's computer system to reset itself. You could also use this time to visually check the oil and coolant levels. Remember; do not remove the coolant reservoir cap if the engine is hot.
Restart the engine
Restart your vehicle to see if the limp mode has been deactivated. If it starts normally, drive carefully and monitor the vehicle's performance.
Check your warning lights
Look at your dashboard for any warning lights. A common cause of limp mode is issues related to the engine, transmission, or emissions system. Note any warning lights for further diagnosis.
Address the identified issues
Based on the error codes and inspection, address the issues either by yourself if you’re skilled in car repairs or by taking your vehicle to a professional mechanic.
Can I drive my car in limp mode?
Yes, you can drive your car in limp mode, but only for a short distance to reach a safe location or a service centre. It’s essential to prioritise safety and avoid driving long distances in this state.
How fast can I drive in limp mode?
In limp mode, your vehicle’s speed is typically limited to around 30 to 45 mph. This reduced speed allows you to drive safely to the nearest garage without causing further damage to your vehicle. Always prioritise safety and avoid pushing the car beyond its restricted capabilities in limp mode.
Still need help with getting your car out of limp mode?
If you need more guidance on dealing with limp mode or any other related issues, our experts are here to help with breakdown cover. Stay safe on the road and ensure your vehicle is in top condition.