neilca Posted October 21, 2017 Share Posted October 21, 2017 My truck has not been on the road in the last 4 years. I now have it ready to go, but it failed the OBD pollution test. It says my computer is not ready to read. The tester said I had to drive the truck for 150 miles for the computer to read all the systems and verify they work. So I am in a catch 22 situation. I have to drive the truck 150 miles yet I cannot get a tag for the truck. Does anyone know how far a 1999 SE Pathfinder needs to be driven before a retest? Link to comment Share on other sites More sharing options...
TowndawgR50 Posted October 22, 2017 Share Posted October 22, 2017 Unfortunately, you cant bypass that portion of the OBD2 process. All of the systems need to cycle and establish a finished/clear status. By resetting the ECU or clearing codes with a reader you're restarting the ECU cycles. Im not sure of the mileage required but maybe you could get a temporary operating permit to drive your truck allowing the ECU to run a systems tests Link to comment Share on other sites More sharing options...
Pathypop Posted October 22, 2017 Share Posted October 22, 2017 150 miles is probably the maximum but the tester probably wanted to be sure they all cleared. I got a new scanner that checks I/M readiness and it would take 50 - 80 miles when I was playing around with it a few times with our 2003. The ECM is looking at a few criteria, like speed over 45, full operating temp, # of starts, etc. You can do a search to find out the specifics and maybe get it done quicker. Get a basic scanner so you can check I/M yourself so you don't get told "it's not ready, give me $50". Link to comment Share on other sites More sharing options...
hawairish Posted October 22, 2017 Share Posted October 22, 2017 See EC-49 here: http://www.nicoclub.com/manuals/Pathfinder/1999_Pathfinder/ec.pdf While you can make-ready the system just by driving around, it's more of a time requirement than distance requirement; you need to satisfy each component with a specific driving pattern. The chart on EC-49 (with notes from EC-50) tells you the driving pattern to follow to tackle all systems in one shot. I recommend printing the pages, using a stopwatch, and having a navigator reading instructions and tracking time. Easy access to a highway or long stretch of uninterrupted road helps for the 53-60MPH segments, and a frontage road with shoulder for the 30-35MPH stop-and-go tests. I've done it a few times in my trucks...you might look a little silly doing it, but it works. Link to comment Share on other sites More sharing options...
neilca Posted October 22, 2017 Author Share Posted October 22, 2017 See EC-49 here: http://www.nicoclub.com/manuals/Pathfinder/1999_Pathfinder/ec.pdf While you can make-ready the system just by driving around, it's more of a time requirement than distance requirement; you need to satisfy each component with a specific driving pattern. The chart on EC-49 (with notes from EC-50) tells you the driving pattern to follow to tackle all systems in one shot. I recommend printing the pages, using a stopwatch, and having a navigator reading instructions and tracking time. Easy access to a highway or long stretch of uninterrupted road helps for the 53-60MPH segments, and a frontage road with shoulder for the 30-35MPH stop-and-go tests. I've done it a few times in my trucks...you might look a little silly doing it, but it works. Good to have, thanks. I asked the DOT for a temporary pass but they said they do not have one to give out since my truck was not tagged last year. I don't even have a plate since I just bought it with the bad transmission. Link to comment Share on other sites More sharing options...
hawairish Posted October 22, 2017 Share Posted October 22, 2017 Supposing you take the right precautions, you could probably perform the driving pattern test with jack stands under the axle, if its not legally permitted to be on the road. Link to comment Share on other sites More sharing options...
Zraver Posted October 23, 2017 Share Posted October 23, 2017 Got a buddy that owns a shop? Have them drive the route. If they get caught, they are fixing a client vehicle so it can pass emissions. 1 Link to comment Share on other sites More sharing options...
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