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Honestly, the best thing to do is to bypass this stupid thing. All it does is blow extra air into the exhaust when you first start the engine to dilute the exhaust with air so that when the EPA sticks a probe in the tailpipe to measure the parts per million of pollution, the get a low enough reading to call the engine a low emissions engine. What a scam. You are emitting the same amount of pollution, just diluting it to make the EPA happy.

Just install a bypass kit and block off the valves so this system never turns on again and you will never get another check engine light because of this system. You can buy the kits from Hewitt for $200 or you can make your own for like $15. You will have to search this forum to find the original bypass system design which will tell you exactly how to make one.

Now that you have the system working, install the bypass kit and you will be good to go for the rest of the life of the truck.
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