First, a reply to wallboard. Your new Toyota's are throwing codes and your old Yale's did not. The reason for that is because the new forklifts have a Tier 3 engine which means stricter emissions and alot more sensors. The new engines will throw a code when you run out of fuel. The only time you need to worry about your check engine light being on is when the truck stops running. As far as the lifting capabilities of your new trucks, that is an application issue. You need to get with your local Toyota dealer, if you don't get satisfaction I'm sure there will be other dealers standing in line to take their place.