Drive the car after resetting Once you have reset your ECU system , it is important to drive the car for around 30 minutes to educate it about your driving style. It requires you to reset computer on the car to get the issue resolved. You would require equipment including battery wrench, a 10-watt resistor, and a cable or insulating tape. It worked!!! Jump to Latest Follow 1 - 3 of 3 Posts. It will leave the code in the computer's memory. Maybe your mechanic or a dealer could do the same for you. I understand that once you turn off the engine after you have done a clear code causes the computer to throw a code if there is anything wrong. Now if you have disconnected the battery to reset it, it takes time not miles, usually 20 minutes of normal driving for the system to relearn, this has to be done in … If it throws a code before I have it reinspected, it won't pass. Thank you for posting instructions so clearly. You can use two methods for resetting your car’s computer. I know that's how all OBD2 systems are designed to work. I was able to reset the computer on my range Rover which automatically calibrates the suspension without having to get it towed and pay the dealer $200 on top of that. The car has been throwing a code that is expensive to fix, thus the subtrafuge. you can try the capacitive discharge method. I tried this after 2 hours of trying to start my car. It will reset the check engine light, but that will probably come back on. What you need to do may vary based on the make and model of your car - when this happened to me, my mechanic was able to print out a sheet for me with the specific drive cycle for my car. Reset Car/computer. You would require equipment including battery wrench, a 10-watt resistor, and a cable or insulating tape. disconnect BOTH battery cables and touch the negative and positive connectors from each CABLE together for a few seconds. I do recall the last time I took the car in for e-check I had reset the computer a few days before, but back then I was driving the car at a rate of ~500 miles/week. If your trying to reset it the hard way, it takes 20 cold starts to reset, a code reader is way faster. I drive a piece of junk 2012 focus. So without any further ado, here is how to reset car computer … Mike It also seems to have stopped the transmission … OBD2 started as a requirement on all cars sold beginning with model year 1996, although some cars had it on earlier model years. Seeing the method he used to reset the computer was the most disappointing experience ever. M ... how long did you leave the battery unplugged? This is an easier way of removing any long term memory saved in your car’s ECU system. later, I read where if you disconnect both cables and then hold them together for 1 minute it will reset the computer. Other ones I was reading simply said “connect the terminals” without explaining what that means. So we half-heartedly took the car to the mechanic. Save Share Reply I'm off to do the 50 miles and then see what happens. Google 'drive cycle after reset'. The reset should restore the ECM to its default settings and clear all car computer-related problems in your vehicles, such as computer codes or illuminated check engine light. posted by southern_sky at 5:19 AM on January 29, 2015 [2 favorites] $250 later, the mechanic opted to reset the car’s computer and everything was back to normal. You are correct.