What is the c342d code on the chevy cobalt?

If You have a check engine light on at the dash in Your Chevy Cobalt the first thing that You should do is try to stop driving as soon as possible. Continuing to drive with a check engine light on at the dash can lead to damage to the vehicle. When You are stopped You can use an OBD II scan tool to be able to read the code that is stored in Your ECU. If You have a code C342D that means that there is a problem with the throttle position sensor. Usually You will notice that there is a delayed acceleration from the engine when this component is failing. You may also notice that Your throttle does not match the position of Your accelerator pedal.