DTC Confirmation Test
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off, connect scan tool and turn ignition on. Using scan tool, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. Ensure fuel tank is 1/4-3/4 full. Drive vehicle at normal speeds for 10 minutes. Stop vehicle. With ignition on, check for current or pending DTC P0451. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If DTC is set, go to DIAGNOSIS & REPAIR PROCEDURE .