We're glad you mentioned your Town & Country's CO results. The CO results are important in diagnosing HC faults. Your Chrysler's high CO (even though it didn't fail for high CO) is an indication that your vehicle might be suffering a "rich misfire", leaving behind high HC (which is raw fuel).
We recommend first conducting a quick visual to ensure there aren't any loose connections, disconnected vacuum lines, and so on... and then move on to the fuel feedback system. This will include inspecting the electronic components such as the Mass Air Flow sensor, Oxygen sensor, Throttle Position sensor, and Engine Coolant Temperature sensor.
posted by SmogTips Support
