Section 41 (Engine Controls - Self-Diagnostics): Summary
WARNING: This page is about a different car, the 2003 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
If no DTCs are present, and driveability symptoms exist, proceed to TROUBLE SHOOTING - NO-CODES article for diagnosis by symptom (i.e., rough idle, no start, etc.).