Should i reset ecu

This is especially true if you accidentally reset your cars ECU by disconnecting the battery to work on something. Also, if your battery died, then the ECU might have got reset.

The ECU is one of the main brains of the car. Another name for it is the Engine Control Module. The job of the ECU is to control different actuators in the engine to make sure that the engine runs at peak performance. It does this by knowing certain information. That information is how much air is going into the engine, how much exhaust is coming out, how much fuel is being injected into the engine, and other things like that.

This is the information that an ECU has to relearn when it has been reset. So, now we can get back to the main question at hand, and that is how long does it take the ECU to relearn this information. Well, sadly there is no straight forward answer to this question. The amount of time can vary. A lot depends on how often you drive the vehicle, how long you drive it, and the style of driving you to do.

Certain conditions have to be meet for the ECU to relearn certain things. Different things take different kinds of driving to be relearned. Basic information the ECU can normally relearn quickly. If you drive your car constantly for minutes, then it might relearn the basic things of air intake and fuel injection.

Other things though may take longer. A lot also has to do with how you are driving. If you are driving slow, then the ECU is normally not able to relearn things as well. Sometimes it can take up to a week for the Engine Control Unit to relearn certain things, especially if you are not driving a lot.

What if you need the ECU to relearn fast because you have an inspection or something. Saaber 1. Neutral Newbie September 21, Share this post Link to post Share on other sites. Dwoon Ravinged 2, For an old car like mine, how do we reset? Goodspeed Clutched September 21, Luckcent Kardachia 0. Neutral Newbie September 23, What do you mean by radio code I don't have the manual lah!! Neutral Newbie September 25, Discoburg 66, Supersonic September 25, Whats radio code?

Yeobh Supersonic September 26, Where do you find this code? Under the bonnett? XLR8 Babyt Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community. Register a new account. Sign in Already have an account? Turn it off, start it back up, and hope the problem is gone.

Some PC users even wait a few seconds to turn the device back on, hoping it gives time for the computer chips to power down. Without getting all scientific about why this works on computers, the principle is simple. When a computer acts screwy, sometimes it needs to be reset so it can work right see Figure 1. Some technicians prefer removing the battery cables and jumping them for 30 minutes. Others like getting fancy and putting a one ohm 10 watt resistor in series and powering down the vehicle for a few minutes.

The same is true of both strategies: A soft reset is known to work wonders. Some high-end scan tools that enable reflashes, such as the Autologic, feature convenient help-lines. When calling the help desk after a failure reflashing, they will recommend that the technician perform a soft reset first. Unlike computers, vehicles do not come with reset buttons.

So, the soft reset remains the only way to get the job done. It also does not hurt that doing a soft reset helps vehicles set their monitors quicker for inspection purposes, too.

It should be noted that as more and more vehicles require idle, steering angle, and other relearns, we do not want to do soft resets haphazardly, especially if we do not have the proper scan tools to perform these relearn procedures. A fleet vehicle was dropped off due to a speedometer which would erratically report different speeds. The vehicle was test driven and it did not act up for a long time. When it did, the scan tool picked up that the Vehicle Speed Sensor VSS parameter identification data PID was giving the same numbers that were being reflected on the instrument cluster.

A call was made to the dealer to see if they stocked a VSS. The Lucerne was back and the first thing the technician tested for was to see if the VSS was defective. However, the sensor itself tested at 1. Granted, checking resistance on an intermittently bad sensor does not prove anything, so it appeared wise to test out the circuit to see if we could narrow down things outside of presuming a sensor from the dealer was bad.