Circuit/System Verification
WARNING: This page is about a different car, the 2006 Saturn Ion 3 and 2006 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
With the ignition ON and the engine OFF, observe that the AIR pressure sensor parameter is nearly identical to the MAP sensor parameter.
- If the AIR pressure sensor and the MAP parameters are not nearly identical then proceed with Circuit/System Testing.