Question

How to reset the ECU?

You can perform an ECU reset on your car either by disconnecting it from the battery or by resetting the fuse in the box. It is a safe and simple process that doesn't take up much time. Here's a step-by-step guide:

Performing an ECU Reset

Method 1: Disconnecting the battery

• Heat your car by driving it for around 15–20 minutes. This is to ensure that the car has reached its optimal working temperature.  
• Now open the hood, find the battery, and safely disconnect the negative lead. Ensure that it doesn’t come in contact with any metallic surfaces.   
• After this, turn the car off and wait a few minutes to allow any electricity inside the ECU unit to bleed out.   
• Now press and hold the brake pedal for a few seconds. This is to facilitate capacitor discharge by illuminating brake lights.   
• After completing all these steps, reconnect all the battery cables, start the car, and see if the ‘check engine’ light persists.   
• The ECU should be reset by now. However, if the ‘check engine’ light persists, it’s time to take your car to the mechanic.   

Method 2: Pulling the fuse 

The easiest way to perform an ECU reset is by removing the fuse from the fuse box. It is a very simple process, and all you have to do is pull out the car key, remove the fuse from the fuse box, and then put it back after about 15 to 20 seconds. Doing this clears any long-term memory stored in the car’s ECU.