Catalytic Converter Monitor and Readiness Code
NOTE:
- During the procedure, do not turn the vehicle to the ACCESSORY mode or the OFF (LOCK) mode.
- All readiness codes are cleared when the battery is disconnected, if DTCs have been cleared, or if the PCM is reset with the HDS.
- Low ambient temperatures or excessive stop-and-go traffic may increase the drive time needed to switch the readiness code from incomplete to complete.
- The readiness code will not switch to complete until all the enable criteria are met.
- If a fault in the secondary HO2S system caused the MIL to come on, the readiness code cannot be set to complete until you correct the fault.
Enable Criteria
- ECT SENSOR 1 at 158 deg.F (70 deg.C) or more.
- IAT SENSOR at 20 deg.F (-7 deg.C) or more.
- Vehicle speed above 25 mph (40 km/h).
Procedure
1. Connect the HDS to the vehicle's data link connector (DLC), and bring up the READINESS CODES screen for Catalyst in the DTCs MENU.
2. Start the engine.
3. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. After about 5 miles (8 km), the readiness code should switch to complete.
4. If the readiness code is still not set to complete, check for a Pending DTC with the HDS. If there is no DTC, one or more of the enable criteria were probably not met; repeat the procedure.