Circuit/System Verification

WARNING: This page is about a different car, the 2006 Saturn Ion 3. However, it is still accessible from the selected car via links, so may be relevant.

Verify the integrity of the MAP sensor system by inspecting for the following conditions:
- Any damage to the MAP sensor housing
- Any damage to the MAP sensor seal
- A loose or improperly installed MAP sensor
- A restriction in the vacuum source of the MAP sensor
Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table. Refer to Altitude vs Barometric Pressure .